Dr Ben Collen

Dr Collen has now left ZSL.

Curriculum Vitae:

• 2007-2013: Research Fellow & Head of Indicators & Assessments Unit .
• 2005-2007: Post Doc. Research Associate, Institute of Zoology.
• 2002-2005: Ph.D. Institute of Zoology and Imperial College London.
• 2001-2002: MRes. Ecology and Environmental Management, University of York.
• 1999-2000: Research assistant. Carnivore research programme, Explore Mara, Kenya (Imperial College London/ILRI Nairobi).
• 1997-2001: B.Sc. Biology with a year in research, Imperial College London.

Research

Rapid destruction of the world’s biodiversity has led to one of the greatest challenges to scientists and societies - balancing the requirements of an expanding human population with the need to effectively conserve the systems that provide the services on which our societies depend. The focus of my research concerns several related areas of understanding extinction risk among species, developing biodiversity indicators to accurately gauge biodiversity depletion and establishing the scientific evidence base for sound environmental decision making (see full list of publications, and the Indicators & Assessments Unit website).

Biodiversity indicators

Accurately measuring global decline in biodiversity is essential to effectively address its depletion. Several metrics are required to capture the complex nature of biodiversity. Arguably one of the most intuitive measures is of change in species status. This relatively coarse measure of change is augmented by measures of change in abundance. I have 2 relevant projects:

- Living Planet Index
- Red List Index

In both, I am interested in new developments and applications, including the improvement of methodological techniques, expanding and improving data and developing the predictive capability of biodiversity indicators.

Relevant publications

• Nicholson E, Collen B, Barausse A, Blanchard J, Burn B, Costello B, Fritz S, Jones J, McRae L, Possingham H, Sullivan K, Underwood F, & Milner-Gulland EJ. (2012) The role of biodiversity indicators in policy. PLoS ONE,
• Collen B & Baillie JEM. (2010) The barometer of life: sampling. Science, 329, 140.
• Butchart SHM, Walpole M, Collen B, et al. (2010) Did we meet the 2010 biodiversity target? A synthesis of global indicators. Science, 328: 1164-1168.
• McRae L, Zockler C, Gill M, Loh J, Latham J, Harrison N, Martin J & Collen B (2010). Arctic Species Trend Index 2010: Tracking trends in Arctic wildlife. CAFF CBMP Report No. 20
• Walpole M, Almond R, Besançon C, Butchart S, Campbell-Lendrum D, Carr GM, Collen B, et al. (2009). Tracking progress towards the 2010 biodiversity target and beyond. Science, 325, 1503-1504.
• Collen B, Loh J, McRae L, Whitmee S, Amin R, & Baillie JEM (2009) Monitoring change in vertebrate abundance: the Living Planet Index. Conservation Biology, 23: 317-327
• Baillie JEM, Collen B, Amin R, Akçakaya HR, Butchart SHM, Brummitt N, Meagher TR, Ram M, Hilton-Taylor C, Mace GM (2008) Towards monitoring global biodiversity. Conservation Letters, 1: 18-26.
  .

Baseline biodiversity assessment

The conservation status of less than 3% of the world’s described biodiversity is currently known. Clearly this limits understanding of the impact of humans on biodiversity, and with it the ability to make informed decisions on conservation planning and action. One of the major challenges for the IUCN Red List is assessing the larger groups that represent the majority of the world’s biodiversity. With these larger groups of less well-known organisms, a comprehensive survey of extinction risk for the whole group is not feasible.

To illustrate the problem, consider the estimated 287,655 plant species of which roughly 85% have been described but of those around 4% have had their conservation status assessed. Producing conservation assessments for the remaining 96% within a reasonable timeframe is not possible. However, the need for a broader view of the status of biodiversity is urgent.

It has become increasingly clear that taxa differ in the relative level of threat they face, with certain groups at higher risk of extinction than others. Determining the reasons for these differences is one of the key actions needed for proactive conservation. As a first step, increased coverage of baseline data is required for The IUCN Red List. A truly global picture of biodiversity requires coverage of all major taxonomic groups. We can no longer afford to base conservation decisions on a restricted and non-representative subset of species.

- Sampled approach to the Red List Index
- National Red List

Relevant publications

• Zamin T, Baillie JEM, Miller R, Rodriguez JP, Ardid A, Collen B. (2010). National Red Listing Beyond the 2010 Target. Conservation Biology. 24: 1012-1020
• Collen B, Ram M, Zamin T, and McRae L (2008). The tropical biodiversity data gap: addressing disparity in global monitoring.Tropical Conservation Science, 1:97-110. Available online: tropicalconservationscience.org
• Baillie JEM, Collen B, Amin R, Akçakaya HR, Butchart SHM, Brummitt N, Meagher TR, Ram M, Hilton-Taylor C, Mace GM (2008) Towards monitoring global biodiversity. Conservation Letters, 1: 18-26.
• Collen B, Ram M, Dewhurst N, Clausnitzer V, Kalkman VJ, Cumberlidge N & Baillie JEM. 2009. Broadening the coverage of biodiversity assessments. In: J-C Vié, C Hilton-Taylor and SN Stuart (eds), Wildlife in a changing world: an analysis of the 2008 Review of The IUCN Red List of Threatened Species. IUCN Gland, Switzerland. pp 67 – 77. PDF
• Clausnitzer V, Kalkman VJ, Ram M, Collen B, et al. (2009). Odonata enter the biodiversity crisis debate: the first global assessment of an insect group. Biological Conservation, 142(8): 1864-1869
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Scaling & prediction of extinction risk

Global species extinction typically represents the end point in a long sequence of population declines and local extinctions. While comparative studies of extinction risk in contemporary species have found universal traits that may predispose taxa to an elevated risk of extinction, and local population level studies have given us insight into the process of population decline and extinction, there is still little appreciation of how local processes scale up to global patterns. In this part of my research I am interested in evaluating the extent to which population decline relates to species extinction, and quantifying variability in risk to different anthropogenic drivers across species and communities.

Relevant publications

• Collen B, McRae L, Deinet S, De Palma A, Carranza T, Loh J, Cooper N & Baillie JEM. (2011) Predicting how populations decline to extinction. Philosophical Transactions of the Royal Society of London B
• Collen B, Bykova E, Ling S, Millner-Gulland E-J. & Purvis A. (2006) Extinction risk: a comparative analysis of central Asian vertebrates. Biodiversity & Conservation, 15: 1859
• Purvis A, Cardillo M, Grenyer R, & Collen B. (2005) Correlates of extinction risk: phylogeny, biology, threat and scale. pp 295-316. Phylogeny and Conservation (ed. by A. Purvis, T. M. Brooks & J. L. Gittleman), Cambridge University Press, Cambridge.
• Collen B, Purvis A, & Gittleman JL. (2004) Biological correlates of description date in carnivores and primates. Global Ecology and Biogeography, 13: 459-467.
  .

Monitoring & prioritisation

The resources available for conservation are insufficient to prevent the loss of much of the world’s threatened biodiversity during this crisis. Conservation planners have been forced to prioritise their protective activities, in the context of great uncertainty – this has become known as ‘the agony of choice’. Firstly I am interested in how to best prioritise conservation. Conservation priority setting based on phylogenetic diversity has frequently been proposed but rarely implemented. Our EDGE project makes an attempt to do this.

Monitoring wildlife presents a number of challenges and the ability to survey and track change in abundance of species is of increasing importance. I have a project in Liberia which is developing camera trap monitoring techniques, particularly targeted at the Pygmy hippo. I've also been collaborating on a monitoring project in Antarctica, developing indices of penguin population and phenological change, with Tom Hart .

Relevant publications

Hutchings JA, Butchart SHM, Collen B, Schwartz MK, Waples RS. (2012) Red Flags: correlates of impaired species recovery. Trends in Ecology & Evolution,

• Collen B, Turvey ST, Waterman C, Meredith HMR, Kuhn TS, Baillie JEM, Isaac NJB (2011). Investing in Evolutionary History: implementing a phylogenetic approach for mammalian conservation. Philosophical Transactions of the Royal Society of London B.
• Collen B, Howard R, Konie J, Daniel O, Rist J. (2011). Field surveys for the Endangered pygmy hippopotamus Choeropsis liberiensis in Sapo National Park, Liberia. Oryx
• Norris, K, Asase A, Collen B, Gockowski J, Mason J, Phalan B. & Wade A. (2010) Biodiversity, ecosystem services and forest loss - the changing face of West African rainforests. Biological Conservation, 143: 2341-2350
• Isaac NJB, Turvey ST, Collen B, Waterman C & Baillie JEM (2007) Mammals on the EDGE: Conservation priorities based on threat and phylogeny. PLoS ONE, 2: e296. PDF
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I&A Unit members

Post docs:

Dr Monika Böhm : Evaluating extinction risk and macroecological patterns in non-vertebrates
Dr Sara Whitmee : Wildlife trends in protected areas

Research Assistants:

Louise McRae
Stefanie Deinet

PhD students:

Charlotte Walters : Current and future conservation status of European bats - start October 2009: NERC, DICE, University of Kent (Co-supervisors Kate Jones , Bob Smith , & Tim Blackburn )

Lucie Bland : Spatial global biodiversity modelling and modelling uncertainty – start October 2010: Imperial College London (Co-supervisors Jon Bielby & David Orme )

Chris Clements : Extinctions in ecological communities and the assessment of extinction risk – start October 2010: NERC, University of Sheffield (Co-Supervisors Owen Petchy , Tim Blackburn )

Helen Meredith : Improving the impact of amphibian conservation programmes - start October 2011: NERC CASE, University of Kent, DICE (Co-supervisors Richard Griffiths , Sam Turvey , Sarah Durant , Jonathan Baillie)

Gita Kasthala: Assessing the cultural and biological values of large highland lakes in Papua, Indonesia - start October 2011: NERC/ESRC, University College London (Co-supervisors Katherine Homewood , Caroline Garaway , Chris Austin)

Ellie Dyer : A global study of the richness, spread and impacts of exotic birds - start October 2012: UCL Impact award, University College London (Co-supervisors Tim Blackburn , Kate Jones , Phill Cassey )

David Curnick: Effectiveness of marine protected areas for protecting migratory pelagic fish species - start January 3013: UCL Impact award, University College London (Co-supervisors Kate Jones , Heather Koldewey , Kirsty Kemp )

Honorary Research Fellows:

Jonathan Loh

Past members:

PhD - Martina Di Fonzo :Post Doc, Centre of Excellence for Environmental Decisions , University of Queensland, Australia
RA - Bernhard Forster: Sapo National Park, Liberia
Post doc - Dr Tom Hart : University of Oxford
RA – Nadia Richman : PhD, IoZ, UK
RA – Julia Latham : PhD, York University, UK
RA – Mala Ram: GIS analyst, Teaching, Italy
RA – Tara Zamin : PhD, Queens University, Canada
RA – Anna Chenery : UNEP-WCMC, UK
RA - Sarah Whitmee: PhD, Imperial College London, UK
RA - Janine Griffiths: Project Coordinator, Royal Botanic Gardens, Kew, UK

Internship Programme

I run a 6 month internship programme on a number of the I&A Unit projects. Past members (50 and counting) of the group have moved onto PhDs, MScs, international and UK based fieldwork, NGOs, IGOs, and government. For information, see the ZSL adverts page .

Appointments

- Honorary Research Fellow, UNEP-WCMC : 2010-present
- Co-chair, IUCN National Red List Working group , 2008 – present
- Member, IUCN Red List Technical Working Group: 2005 - present
- Member, IUCN Red List Committee: 2010 - present
- Member, IUCN Hippo specialist group, pygmy hippo subgroup: 2009 - present [Link]
- Co-chair, Global Biodiversity Information Facility user assessment task: 2009
- Member, GEO-BON Terrestrial working group
- Associate Editor, Tropical Conservation Science , 2008 – present
- Member, IUCN Species Survival Commission Sustainable USe Specialist Group Steering Committee: 2008 - 2010
- Member, IUCN Species Survival Commission Sub Committee on Biodiversity Indicators: 2004-2008
- Member, Conservation Commons Steering Committee: 2009-present

Principal collaborators:

IUCN
WWF
BirdLife
RBG Kew
Imperial College London
University of Oxford
University College London
UNEP-WCMC
.

Full publications list:

Journal articles
Clements, CF, Worsfold NT, Warren PH, Clarke N, Collen B, Blackburn T, Petchy OL. (2012) Optimal Linear Estimation – Experimentally testing the accuracy of an extinction predictor. Journal of Animal Conservation,

Böhm, M., Collen, B., et al. [+242 others] (2012) The conservation status of the world's reptiles. Biological Conservation,

Vogt T, Forster B, Quawah JN, Ransom C, Hodgkinson C, & Collen B. (2012). First photographs of Liberian mongoose (Liberiictis kuhni) in Sapo National Park, Liberia. Small Carnivore Conservation

McRae L, Gill M, Böhm M, Deinet S, & Collen B (2012) The Arctic Species Trend Index: using vertebrate population trends to monitor the health of this rapidly changing ecosystem. Biodiversity,

Hutchings JA, Butchart SHM, Collen B, Schwartz MK, Waples RS. (2012) Red Flags: correlates of impaired species recovery. Trends in Ecology & Evolution,

Nicholson E, Collen B, Barausse A, Blanchard J, Burn B, Costello B, Fritz S, Jones J, McRae L, Possingham H, Sullivan K, Underwood F, & Milner-Gulland EJ. (2012) The role of biodiversity indicators in policy. PLoS ONE,

Durant SM, Pettorelli N, Bashir S, Woodroffe R, Wacher T, De Ornellas P, Ransom C, Abáigar T, Abdelgadir M, El Alqamy H, Beddiaf M, Belbachir F, Belbachir-Bazi A, Berbash AA, Beudels-Jamar R, Boitani L, Breitenmoser C, Cano M, Chardonnet P, Collen B, Cornforth WA, Cuzin F, Gerngross P, Haddane B, Hadjeloum M, Jacobson A, Jebali A, Lamarque F, Mallon D, Minkowski K, Monfort S, Ndoassal B, Newby J, Ngakoutou BE, Niagate B, Purchase G, Samaïla S, Samna AK, Sillero-Zubiri C, Soultan AE, Stanley Price MR, Baillie JEM. (2012) Forgotten biodiversity: conservation neglect and the empty desert. Science, 336: 1379

Gower D, Aberra R, Schwaller S, Largen M, Collen B, Spawls S, Menegon M, Zimkus B, de Sá R, Mengistu A, Gebresenbet F, Moore R, Saber S & Loader S. (2012) Long-term data for endemic frog genera reveal potential conservation crisis in the Bale Mountains, Ethiopia. Oryx,

Bland LM, Collen B, Orme CDL, Bielby J. (2012) Data uncertainty and the selectivity of extinction risk in freshwater invertebrates. Diversity & Distributions,

Collen B, & Böhm M (2012) The growing availability of invertebrate extinction risk assessments - a response to Cardoso et al. (October 2011): Adapting the IUCN Red List criteria for invertebrates. Biological Conservation, 149: 145-146

Collen, B, Turvey ST, Waterman C, Meredith HMR, Kuhn TS, Baillie JEM, Isaac NJB (2011). Investing in Evolutionary History: implementing a phylogenetic approach for mammalian conservation. Philosophical Transactions of the Royal Society of London B, 366, 2611-2622

Sparks TH, Butchart SHM, Balmford A, Bennun L, Stanwell-Smith D, Walpole M, Bates N, Bomhard B, Bruno J, Buchanan G, Chenery AM, Collen B, Csirke J, Diaz RJ, Dulvy N, Fitzgerald C, Herkenrath P, Kapos V, Mayaux P, Tierney M, Waycott M, Wood L & Green RE. (2011) Linked indicator sets for addressing biodiversity loss. Oryx, 45, 411-419

Collen B, Howard R, Konie J, Daniel O, Rist J. (2011). Field surveys for the Endangered pygmy hippopotamus Choeropsis liberiensis in Sapo National Park, Liberia. Oryx, 45, 35-37

Collen B, McRae L, Deinet S, De Palma A, Carranza T, Loh J, Cooper N & Baillie JEM. (2011) Predicting how populations decline to extinction. Philosophical Transactions of the Royal Society of London B, 366, 2577-2586

Galewski T, Collen B, McRae L, Loh J, Grillas P, Gauthier-Clerc M, & Devictor V (2011). Long term trends in the abundance of Mediterranean wetland vertebrates: from global recovery to localized declines. Biological Conservation, 144, 1392-1399

Jones JPG, Collen B, Baxter PWJ, Bubb P, Illian JB, Katzner TE, Keane A, Loh J, McDonald-Madden E, Nicholson E, Pereira HM, Possingham HP, Pullin AS, Rodrigues ASL, Ruiz-Gutierrez V, Sommerville M, Milner-Gulland EJ (2011). The why, what and how of biodiversity indicators beyond the 2010 target. Conservation Biology, 25: 450-457

Rodríguez JP, Rodríguez-Clark KM, Baillie JEM, Ash N, Benson J, Boucher T, Brown C, Burgess N, Collen B, et al. (2011). Establishing IUCN Red List criteria for threatened ecosystems. Conservation Biology, 25, 21-29

Hoffmann M, Hilton-Taylor C, Angulo A, Böhm M, Brooks TM, Butchart SHM, Carpenter KE, Chanson J, Collen B, et al. (2010) The Impact and Shortfall of Conservation on the Status of the World’s Vertebrates. Science, 330:1503-1509

Pereira HM, Proença V, Belnapp J, Brummitt N, Collen B, Ding H, Gonzalez M, Gregory RD, Honrado J, Jongman R, Julliard R, McRae L, Rodrigues P, Opige M, Rodriguez JP, Schmeller D, van Swaay C, Vieira C. (2010). Global biodiversity monitoring: filling the gap where it counts the most. Frontiers in Ecology and the Environment. 8,459-460

Butchart SHM, Baillie JEM, Chenery A, Collen B, Gregory RD, Revenga C, Walpole M (2010) Response to Xu et al. Science, 329, 900-901

Mace GM, Collen B, Fuller RA, Boakes EH. (2010) Population and geographic range dynamics: implications for conservation planning. Philosophical Transactions of the Royal Society of London B, 365, 3743-3751

Collen B & Baillie JEM. (2010) The barometer of life: sampling. Science, 329, 140

Butchart SHM, Walpole M, Collen B, et al. (2010) Global biodiversity: indicators of recent declines. Science, 328: 1164-1168.

Craigie I, Baillie JEM, Balmford A, Carbone C, Collen B, Green R, Hutton J. (2010). Large mammal population declines in Africa’s Protected Areas. Biological Conservation, 143, 2221-2228.

Collen B, Purvis A & Mace GM (2010). When is a species really extinct? Inferring extinction from a sightings record to inform conservation assessment. Diversity & Distributions, 16,755-764

Turvey ST, Barrett LA, Hart T, Collen B, Hao Yujiang, Zhang Lei, Zhang Xinqiao, Wang Xianyan, Huang Yadong, Zhou Kaiya, & Wang Ding (2010) Spatial and temporal extinction dynamics in a freshwater cetacean. Proceedings of the Royal Society of London B: Biological Sciences, doi: 10.1098/rspb.2010.0584

Norris, K, Asase A, Collen B, Gockowski J, Mason J, Phalan B. & Wade A. (2010) Biodiversity in a forest-agriculture mosaic – the changing face of West African rainforests. Biological Conservation, 143: 2341-2350

Zamin T, Baillie JEM, Miller R, Rodriguez JP, Ardid A, Collen B. (2010). National Red Listing Beyond the 2010 Target. Conservation Biology, 24: 1012-120

Walpole M, Almond R, Besançon C, Butchart S, Campbell-Lendrum D, Carr GM, Collen B, et al. (2009). Tracking progress towards the 2010 biodiversity target and beyond. Science, 325, 1503-1504.

Sachs JD, Baillie JEM, Sutherland WJ, Armsworth P, Ash N, Bateson P, Beddington J, Blackburn T, Collen B, et al. (2009) Biodiversity conservation and the Millennium Development Goals. Science, 325, 1502-1503.

Cumberlidge N, Ng PK, Yeo DCJ, Magalhaes C, Campos MR, Alvarez F, Naruse T, Daniel SR, Esser LJ, Attipoe FYK, Clotilde-Ba F-L, Darwall W, Mcivor A, Baillie JEM, Ram M, Collen B. (2009) Freshwater crabs and the biodiversity crisis: importance, threats, status, and conservation challenges. Biological Conservation, 142(8): 1665-1673

Clausnitzer V, Kalkman VJ, Ram M, Collen B, Baillie JEM, Bedjanič M, Darwall WRT, Dijkstra K-DB, Dow R, Hawking J, Karube H, Malikova E, Paulson D, Schütte K, Suhling F, Villanueva R, von Ellenrieder N, and Wilson K (2009). Odonata enter the biodiversity crisis debate: the first global assessment of an insect group. Biological Conservation, 142(8): 1864-1869

Collen B, Loh J, McRae L, Whitmee S, Amin R, & Baillie JEM (2009) Monitoring change in vertebrate abundance: the Living Planet Index. Conservation Biology, 23: 317-327

Salafsky N, Butchart SHM, Salzer D, Stattersfield AJ, Neugarten R, Hilton-Taylor C, Collen B, Master LL, O’Connor S,& Wilkie D (2009). Pragmatism and practice in classifying threats: A reply to Balmford et al. Conservation Biology, 23: 488-493

Schipper J., Chanson J., Chiozza F., Cox N., Hoffmann M., Katariya V., Lamoreux J., Rodrigues A., Stuart S.N., Temple H.J., Baillie J.E.M., Boitani L., Lacher T.E., Mittermeier R.A., Smith A.T., Absolon D., Aguiar J.M., Amori G., Bakkour N., Baldi R.A., Berridge R.J., Bielby J., Black P.A., Blanc J.J., Brooks T.M., Burton J.A., Butynski T.M., Catullo G., Chapman R., Cokeliss Z., Collen B., et al (2008). The biogeography of diversity, threat, and knowledge in the world's terrestrial and aquatic mammals. Science, 322: 225-230

Salafsky N, Salzer D, Stattersfield AJ, Hilton-Taylor C, Neugarten R, Butchart SHM, Collen B, Cox N, Master LL, O’Connor S,& Wilkie D (2008). A Standard Lexicon for Biodiversity Conservation: Unified Classifications of Threats and Actions. Conservation Biology, 22: 897-911.

Baillie JEM, Collen B, Amin R, Akçakaya HR, Butchart SHM, Brummitt N, Meagher TR, Ram M, Hilton-Taylor C, Mace GM (2008) Towards monitoring global biodiversity. Conservation Letters, 1: 18-26.

Collen B, Ram M, Zamin T, and McRae L (2008). The tropical biodiversity data gap: addressing disparity in global monitoring.Tropical Conservation Science, 1:97-110. PDF

Isaac NJB, Turvey ST, Collen B, Waterman C & Baillie JEM (2007) Mammals on the EDGE: Conservation priorities based on threat and phylogeny. PLoS ONE, 2: e296. PDF

Butchart SNM, Akçakaya HR, Chanson J, Baillie JEM, Collen B, Quader S, Turner WR, Amin R, Stuart SN, Hilton-Taylor C. (2007) Corrections and improvements to the Red List Index. PLoS ONE, 2: 1-8 PDF

Collen, B., Bykova, E., Ling, S., Millner-Gulland, E-J. & Purvis, A. (2006) Extinction risk: a comparative analysis of central Asian vertebrates. Biodiversity & Conservation, 15: 1859

Collen, B., Purvis, A. & Gittleman, J. L. (2004) Biological correlates of description date in carnivores and primates. Global Ecology and Biogeography, 13: 459-467.

Books & chapters

Collen B, Pettorelli N, Baillie JEM, & Durant S. (2013). Biodiversity Monitoring & Conservation: Bridging the gap between global commitment and local action. Willey-Blackwell, Cambridge, UK.

Stuart SN, & Collen B. (2013). Conserving biodiversity in a target driven world. Pp 421-438, in: Biodiversity Monitoring & Conservation: Bridging the gap between global commitment and local action. (Ed by B Collen, N Pettorelli, JEM Baillie, & S Durant). Willey-Blackwell, Cambridge, UK.

Collen B, Griffiths J, Friedman Y, & Rodríguez JP, Rojas-Suárez F, Baillie JEM (2013). Tracking changes in national conservation status: National Red Lists. pp 19-44, in: Biodiversity Monitoring & Conservation: Bridging the gap between global commitment and local action. (Ed by B Collen, N Pettorelli, JEM Baillie, & S Durant). Willey-Blackwell, Cambridge, UK.

Collen B, McRae L, Loh J, Deinet S, De Palma A, Manley R & Baillie JEM. (2013). Tracking change in abundance: the living planet index. pp 71-94, in: Biodiversity Monitoring & Conservation: Bridging the gap between global commitment and local action. (Ed by B Collen, N Pettorelli, JEM Baillie, & S Durant). Willey-Blackwell, Cambridge, UK.

Collen B, Pettorelli N, Baillie JEM, & Durant S. (2013). Biodiversity Monitoring & Conservation: Bridging the gap between global commitment and local action. pp 1-16, in: Biodiversity Monitoring & Conservation: Bridging the gap between global commitment and local action. (Ed by B Collen, N Pettorelli, JEM Baillie, & S Durant). Willey-Blackwell, Cambridge, United Kingdom

Collen B (in press) Descriptive Taxonomy Serving Biodiversity: a conservation Biology perspective. In: Descriptive Taxonomy: The Foundation of Biodiversity Research (Ed. C. Lyal), Cambridge University Press, Cambridge UK.

Collen B & Turvey ST (2009) Probabilistic methods for determining extinction chronologies. In: Holocene extinctions (Ed. S. Turvey), Oxford University Press, Oxford, UK, pp. 181-192

Collen B, Ram M, Dewhurst N, Clausnitzer V, Kalkman VJ, Cumberlidge N & Baillie JEM. (2009). Broadening the coverage of biodiversity assessments. In: Wildlife in a changing world: an analysis of the 2008 Review of The IUCN Red List of Threatened Species (Eds. J-C Vié, C Hilton-Taylor and SN Stuart), IUCN Gland, Switzerland. pp 67 – 77. PDF

Purvis, A., Cardillo, M., Grenyer, R. & Collen, B. (2005) Correlates of extinction risk: phylogeny, biology, threat and scale. pp 295-316. Phylogeny and Conservation (Eds. A. Purvis, T. M. Brooks & J. L. Gittleman), Cambridge University Press, Cambridge.

Published reports

Collen B, Böhm M, Kemp R. & Baillie JEM (2012) Spineless: status and trends of the world's invertebrates. Zoological Society of London, United Kingdom Download (4.8 MB)

McRae L, Collen B, Deinet S, Hill P, Loh J, Baillie JEM & Price V (2012) The Living Planet Index (Ed M Grooten) Living Planet report 2012. WWF, Gland, Switzerland

Eamer J, Russell DE, McRae L, Böhm M, Deinet S, Collen B & Gill MJ. (2012) Arctic Species Trend Index 2011: Update of the ASTI, an in-depth look at marine species, and development of spatial analysis techniques. CAFF CBMP Technical Report, Reykjavik, Iceland.

Böhm M, McRae L, Deinet S, Gill M & Collen B (2012) Tracking trends in Arctic vertebrate populations through space and time. CAFF CBMP Technical Report, Reykjavik, Iceland.

McRae L, Deinet S, Gill M & Collen B (2012) Tracking trends in Arctic marine populations. CAFF CBMP Technical Report, Reykjavik, Iceland.

Armenteras D, Finlayson M, Rosser A, Walpole M, Agard J, Butchart S.H.M, Carino J, Collen B, Firbank L, Galli A, Gokhale Y, Hocking M, Hoft R, Kitzes J, Prip C, Redford K.H, McGeoch M, Oldfield T. & Toivonen H. (2012) Biodiversity. In Global Environmental Outlook 5 (ed GEO 5), United Nations Environment Programme.

Svoboda M, Gill M, Barry T, Crane K, Collen B, Culp J, Friedman A, Gantner N, Goedkoop W, Gofman V, Hindrum R, Irons D, Loh J, McRae L, Petersen A, Reist J, Russell D, Simpkins M, Smith R, Vongraven D, Wrona F, & Zockler C (2011). The Circumpolar Biodiversity Monitoring Program. Pp 423-434, in Understanding Earth's Polar Challenges: International Polar Year 2007-2008 (Ed by I Krupnik, I Allison, R Bell, P Cutler, D Hik, J López-Martínez, V Rachold, E Sarukhanian & C Summerhayes). University of the Arctic, Rovaniemi, Finland /CCI Press (Printed Version), Edmonton, Alberta, Canada and ICSU/WMO Joint Committee for International Polar Year 2007–2008.

Böhm M, & Collen B (2011) Rapid review of biodiversity technology transfer in the United Kingdom. Report to the Convention on Biological Diversity. Defra, United Kingdom

Gill MJ, Zöckler C, McRae L, Loh J, & Collen B (2011) The Arctic Species Trend Index: A barometer for Arctic wildlife. In State of the Arctic Coast 2010: scientific review and outlook (ed Forbes DL), International Arctic Science Committee, Land-Ocean Interactions in the Coastal Zone, Arctic Monitoring and Assessment Programme, International Permafrost Association, Germany.

Baillie JEM, Griffiths J, Turvey ST, Loh J & Collen B (2010) Evolution Lost: status and trends of the world’s vertebrates. pp 65. Zoological Society of London, United Kingdom. PDF

Gill MJ, Zockler C, McRae L, Loh J, & Collen B. (2010) The Arctic Species Trend Index: a barometer for Arctic Wildlife. In: J Richter-Menge & J.E. Overland (Eds) Arctic Report card: update for 2010. www.arctic.noaa.gov/reportcard

Loh J, Collen B, McRae L, Deinet S, De Palma A, Manley R & Baillie JEM (2010) Living Planet Index (ed Almond R). Living Planet Report 2010. WWF, Gland, Switzerland.

Gill MJ, Zockler C, McRae L, Loh J & Collen B (2010). The Arctic Species Trend Index (Eds Kurvits T, Alfthan B & Mork E). Arctic Biodiversity Trends 2010 - selected indicators of change. CAFF International Secretariat, Akureyi, Iceland.

McRae L, Zockler C, Gill MJ, Loh J, Latham J, Harrison N, Martin J & Collen B (2010). Arctic Species Trend Index 2010: Tracking trends in Arctic wildlife. CAFF CBMP Report No. 20

Deinet S, Collen B, De Palma A, Loh J, Manley R, & McRae L. (2010) The Living Planet Index for Global Estuarine systems. Technical report. WWF Netherlands, Netherlands.

Bubb PJ, Butchart S, Collen B, Dublin H, Kapos V, Pollock C, Stuart SN, Vié J-C (2009) IUCN Red List Index - Guidance for National and Regional Use. IUCN, Gland, Switzerland.

Loh J, Collen B, McRae L, Carranza TT, Pamplin FA, Amin R, & Baillie JEM (2008) Living Planet Index (ed Hails C). Living Planet Report 2008. WWF, Gland, Switzerland.

McRae L, Loh J, Bubb PJ, Baillie JEM, Kapos V, Collen B (2008) The Living Planet Index - Guidance for National and Regional Use. UNEP-WCMC, Cambridge, UK.

Collen B, McRae L, Kothari G, Mellor R, Daniel O, Greenwood A, Amin R, Holbrook S, & Baillie J (2008) 2010 & beyond: Rising to the biodiversity challenge, (eds J. Loh & S. Goldfinger). WWF, Gland, Switzerland.

Latham J, Collen B, McRae L, Loh J. (2008) The Living Planet Index for Migratory Species: an index of change in population abundance. A report for the Convention on Migratory Species, United Nations Environment Programme.

McRae L, Loh J, Collen B, Holbrook S, Latham J, Tranquilli S, & Baillie, J. (2007) A Living Planet Index for Canada, (ed. S. Mitchell). Living Planet Report for Canada, WWF Canada, Canada.

Loh J, Collen B, McRae L, Holbrook S, Amin R, Ram M, & Baillie J. (2006) Living Planet Index, (eds J. Loh & S. Goldfinger). Living Planet Report, WWF, Gland, Switzerland.

Unpublished reports

Collen B & Rist J. (2008) Testing the usability of GBIF data for use in 2010 biodiversity indicators. A report for the European Environment Agency.

Collen B, Konie J, Rist J & Howard R. (2008) Constructing the Evidence base for the pygmy hippo in Sapo National Park, Liberia. Forestry Development Authority, Liberia.