Drs. M. (Merlijn) van Weerd
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Telephone number:
+31 (0)71 527 1484
E-Mail:
vanweerd@cml.leidenuniv.nl
Faculty / Department: Centrum voor Milieuwetenschappen Leiden, Conservation Biology
Office Address: Van Steenis gebouw
Einsteinweg 2
2333 CC Leiden
Room number B309
- Professional experience
- Merlijn van Weerd graduated in 1996 at the University of Groningen with a MSc (Drs.) degree in biology, specialisation animal ecology. During his study he conducted fieldwork in Cameroon on the impact of floodplain restoration on water bird populations and fieldwork in Mozambique on shore birds and their food supplies. In 1997 he conducted fieldwork on the Dutch island of Schiermonnikoog on the breeding behaviour of Oystercatchers for the University of Groningen. In 1998 he was ecologist for the CML at the Waza-Logone project in Cameroon working on freshwater fish migration and conducting bird and mammal surveys. From 1999 till 2002 he worked as a wildlife biologist for the Northern Sierra Madre Natural Park – Conservation Project in Luzon, the Philippines. Within this Dutch funded integrated conservation and development project, he trained local wildlife researchers, conducted biodiversity surveys of birds, mammals, amphibians, reptiles, freshwater fishes and butterflies, studied wildlife resource utilisation and assisted in the development of conservation and natural resource management plans for the region. In 2003, Merlijn started work at the CML as a PhD researcher on the wildlife diversity, utilisation and conservation of Northeast Luzon. In addition, he is co-ordinator of a Philippine crocodile research and conservation program. He is a member of the IUCN Species Survival Commission and of the IUCN Crocodile Specialist Group.
Regional specialisation: Philippines, Cameroon, Mozambique, Netherlands.
- Research topics
- Biodiversity in tropical forest ecosystems
- The impact of deforestation and fragmentation on tropical forest biodiversity
- Local utilisation and management of natural resources
- Conservation of biodiversity at various organisational levels
- Status, ecology and conservation of the Philippine crocodile Crocodylus mindorensis
- Wetlands and water-birds
2010
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Weerd, M., van & Guerrero, J. & Balbas, M.G. & Telan, S. & Ven, W., van de & Rodriquez, D. & Masipiqueña, A.B. & Ploeg, J., van der & Antolin, R. & Rebong, G. & Iongh, H.H., de (2010)
Reintroduction of captive-bred Philippine crocodiles. Oryx, 44 (1), p. 13.
(Article / Letter to editor)
2009
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Cauilan-Cureg, M. & Balbas, M.G. & Ploeg, J., van der & Weerd, M., van (2009)
An update of the Philippine crocodile communication, education and public awareness campaign in the Northern Sierra Madre. In Masipiqueña, A.B., Weerd, M., van, Udto, R.G. (Eds.) Changing Landscapes. Proceedings of the sixth international conference on environment and development. (pp. 293-317). Manilla: CVPED.
(Article in monograph or in proceedings) -
Weerd, M., van & Araño, R.R. (2009)
A biodiversity hotspot. In: Persoon, G.A., Masipiqueña, A.B., Ploeg, J., van der, Masipiqueña, M.D., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 137-147. Cabagan: CVPED.
(Part of book or chapter of book) -
Weerd, M., van & Snelder, D.J.R.M. & Spijkerman, L. & Masipiqueña, A.B. (2009)
A bird's eye view of Northeast Luzon. In: Persoon, G.A, Masipiqueña, A.B., Ploeg, J., van der, Masipiqueña, M.D., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 41-51. Cabagan: CVPED.
(Part of book or chapter of book) -
Masipiqueña, A.B. & Weerd, M., van & Udto, R.G. (Eds.) (2009)
Changing Landscapes. Proceedings of the sixth international conference on environment and development. Manilla: CVPED.
(Book editorial) -
Persoon, G.A. & Masipiqueña, A.B. & Ploeg, J., van der & Masipiqueña, M.D. & Weerd, M., van (Eds.) (2009)
Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre. Manila: CVPED.
(Book editorial) -
Ploeg, J., van der & Balbas, M.G. & Weerd, M., van (2009)
Do crocodiles have rabies? Initiating a dialogue on in-situ crocodile conservation. Crocodile Specialist Group Newsletter, 28 (3), pp. 8-10.
(Article / Letter to editor) -
Ven, A.C., van de & Guerrero, J.P. & Rodriguez, D.G. & Telan, S.P. & Balbas, M.G. & Tarun, B.A. & Weerd, M., van & Ploeg, J., van der & Wijtten, Z. & Lindeyer, F.E. & Iongh, H.H., de (2009)
Effectiveness of head starting to bolster Philippine crocodile Crocodylus mindorensis. Conservation Evidence, 6 (4), pp. 111-116.
(Article / Letter to editor) -
Ploeg, J., van der & Rodriguez, D. & Masipiqueña, A.B. & Ven, W., van de & Guerrero, J. & Iongh, H.H., de & Telan, S. & Gatan-Balbas, M. & Boven, G., van & Tarun, B. & Cauilan-Cureg, M. & Weerd, M., van (2009)
Hope for the Philippine Crocodile. In: Persoon, G.A., Masipiquena, A.B., Ploeg, J., van der, Masipiquena, M.D., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 169-179. Manila: CVPED.
(Part of book or chapter of book) -
Ploeg, J., van der & Arano, R. & Top, G.M., van den & Masipiqueña, A.B. & Weerd, M., van & Macadangdang, A. (2009)
Logging the last forest. In: Persoon, G.A., Masipiqueña, A.B., Ploeg, J., van der, Masipiqueña, M.D., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 85-95. Manila: CVPED.
(Part of book or chapter of book) -
Lavieren, H., van & Iongh, H.H., de & Belen, A. & Weerd, M., van (2009)
Managing coastal Resources. In: Persoon, G., Ploeg, J., van der, Masipiquena, A., Weerd, M., van (Eds.), Crossing Boundaries, pp. 159-167. Manila: Studieo Graphics Corporation.
(Part of book or chapter of book) -
Admiraal, J. & Weerd, M., van & Cauilan-Cureg, M. & Ploeg, J., van der & Balbas, M.G. (2009)
Manual on Philippine crocodile conservation. Manilla: Mabuwaya Foundation Inc..
(Book (monograph)) -
Ploeg, J., van der & Weerd, M., van (2009)
Northern Sierra Madre Natural Park: van prioriteit naar vergetelheid. Ecologie & Ontwikkeling, 17 (78), pp. 34-36.
(Article / Letter to editor) -
Cauilan-Cureg, M. & Ploeg, J., van der & Weerd, M., van & Udto, R.G. & Balbas, M.G. (2009)
Philippine crocodile, something to be proud of. Manilla: Mabuwaya Foundation Inc..
(Book (monograph)) -
Weerd, M., van & Balbas, M.G. (2009)
Report support mission Mabuwaya Foundation to Wahana Bumi Hijau (WBH) in South Sumatra, Indonesia regarding the project: "protection of the Senyulong crocodile habitat in the Merang-Kepayang peat swamp forest". Cabagan: Mabuwaya Foundation Inc..
(External research report) -
Persoon, G.A. & Masipiqueña, A.B. & Ploeg, J., van der & Masipiqueña, M.D. & Weerd, M., van (2009)
Research themes, projects and education. In: Persoon, G.A., Masipiqueña, A.B., Ploeg, J., van der, Masipiqueña, M.D., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 19-39. Manila: CVPED.
(Part of book or chapter of book) -
Villanueva, R.J. & Ploeg, J., van der & Weerd, M., van (2009)
Some Odonata from the Northern Sierra Madre Natural Park, Isabela, Luzon, Philippines. Agrion, 13 (2), pp. 72-74.
(Article / Letter to editor) -
Weerd, M., van & Balbas, M.G. (2009)
Strengthening community-based wetland conservation in Cagayan Valley. Cabagan: Mabuwaya Foundation Inc..
(External research report) -
Arano, R. & Weerd, M., van & Ploeg, J., van der (2009)
The Northern Sierra Madre Natural Park. In: Persoon, G.A., Masipiqueña, A.B., Ploeg, J., van der, Masipiqueña, M.D., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 149-157. Manila: CVPED.
(Part of book or chapter of book) -
Persoon, G.A. & Weerd, M., van & Aquino, D.M. & Minter, T. (2009)
Value from the forest. In: Persoon, G.A., Masipiqueña, A.B., Ploeg, J., van der, Masipiqueña, A.B., Weerd, M., van (Eds.), Crossing Boundaries: celebrating 20 years of environmental research in Cagayan Valley and Sierra Madre, pp. 107-115. Manila: CVPED.
(Part of book or chapter of book)
2008
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Ploeg, J., van der & Weerd, M., van (2008)
Creating space for crocodiles: environmental governance in the Philippines. In: Santen, J., van (Ed.), Development in Place: Perspectives and Challenges, pp. 214-246. Amsterdam: Askant.
(Part of book or chapter of book) -
Ploeg, J., van der & Weerd, M., van (2008)
Crocodile rehabilitation, observance and conservation (CROC) project: the conservation of the critically endangered Philippine crocodile (Crocodylus mindorensis) in Northeast Luzon, the Philippines. Cabagan: Mabuwaya Foundation.
(External research report) -
Weerd, M., van & Snelder, D.J.R.M. (2008)
Human-altered tree-based habitats and their value in conserving bird and bat diversity in Northeast Luzon, the Philippines. In: Snelder, D.J.R.M/ & Lasco, R.D. (Eds.), Smallholder tree growing for rural development and environmental services (Advances in Agroforestry), 5. , pp. 347-378. Gainesville: Springer.
(Part of book or chapter of book) -
Ploeg, J., van der & Weerd, M., van (2008)
Mens over dier: Operatie 'Free Isabela'. Ecologie en Ontwikkeling, 16 (75), pp. 70.
(Article / Letter to editor) -
Ploeg, J., van der & Cureg, M.C. & Weerd, M., van (2008)
Mobilizing public support for in-situ conservation of the Philippine crocodile in the Northern Sierra Madre: something to be proud of! National Museum Papers, 13 (1-4), pp. 68-94.
(Article / Letter to editor) -
Weerd, M., van & Ploeg, J., van der (2008)
Philippine crocodile hatchling head-start and re-enforcement program in San Mariano, Isabela Province, Luzon, the Philippines. In: Soorae, P.S. (Ed.), Global re-introduction perspectives: re-introduction case-studies from around the globe, pp. 79-83. Abu Dhabi: IUCN/SCC Re-introduction Specialist Group.
(Part of book or chapter of book) -
Villamor, G.B. & Ambal, R.G. & Boffa, J.-M. & Brookes, T. & Cereno, A. & Coroza, O. & Lasco, R.D. & Schroth, G. & Weerd, M., van (2008)
Setting landscape conservation targets and promoting them through compatible land use in the Philippines. Bogor, Indonesia: World Agroforestry Centre.
(External research report) -
Iongh, H.H., de & Weerd, M., van (2008)
The use of avian guilds for monitoring Borneo lowland forests: methodology development for rapid assessment of avian communities. In: Persoon, G.A. & Osseweijer, M. (Eds.), Reflections on the Heart of Borneo (Tropenbos Series), 24. , pp. 49-68. Wageningen: Tropenbos International.
(Part of book or chapter of book)
2007
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Ploeg, J., van der & Weerd, M., van (2007)
A re-enforcement strategy for the critically endangered Philippine crocodile population in the Northern Sierra Madre: pilot project. Cabagan: Mabuwaya Foundation.
(External research report) -
Ploeg, J., van der & Weerd, M., van & Telan, S. (2007)
Cross visit to Liguasan marsh. Crocodile Specialist Group Newsletter, 26 (4), pp. 11.
(Article / Letter to editor) -
Iongh, H.H., de & Weerd, M., van & Pieters, S. & Wielstra, B. (2007)
Results of research on the use of Avian guilds for monitoring Bornean lowland forests. In Iongh, H.H., de, Persoon, G.A., Kustiawan, W. (Eds.) Options for biodiversity conservation and sustainable use in lowland forests of Southeast Borneo (pp. 171-196). Leiden: Tropenbos/CML/UNMUL.
(Article in monograph or in proceedings)
2006
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Ploeg, J., van der & Weerd, M., van (2006)
A paradigm shift in Philippine crocodile conservation. Crocodiles. Proceedings of the 18th working meeting of the Crocodile Specialist Group (pp. 165-186). Gland/Cambridge: IUCN.
(Article in monograph or in proceedings) -
Persoon, G.A. & Weerd, M., van (2006)
Biodiversity and natural resource management in insular Southeast Asia. Islands Studies Journal, 1 (1), pp. 81-108.
(Article / Letter to editor) -
Oliveros, C. & Telan, S. & Weerd, M., van (2006)
Crocodile surveys on Dalupiri and Fuga. Manila: Isla Biodiversity Inc. and Mabuwaya Foundation Inc..
(External research report) -
Ploeg, J., van der & Weerd, M., van (2006)
Crocodiles in the mist. In Persoon, G.A., Barendse, G.W.J., Bezemer, H. (Eds.) Sporen van een gedreven pionier (pp. 71-81). Leiden: CML.
(Article in monograph or in proceedings) -
Ploeg, J., van der & Weerd, M., van (2006)
Enlarged scales: strengthening Philippine crocodile conservation in the Sierra Madre corridor.
(Commission report or memorandum) -
Weerd, M., van & Ploeg, J., van der & Rodriguez, D. & Guerrero, J. & Tarun, B. & Telan, S. & Jonge, J., de (2006)
Philippine crocodile conservation in Northeast Luzon: an update of population status and new insights into Crocodylusmindorensis ecology. In IUCN/SCC, (Ed.) Proceedings of the 18th Working Meeting of the Crocodile Specialist Group (pp. 305-320). Montélimar
(Article in monograph or in proceedings) -
Weerd, M., van & Ploeg, J., van der (2006)
Report on the community-based crocodilian conservation workshop of the IUCN/SSC meeting 2006. Crocodiles. Proceedings of the 18th working meeting of the Crocodile Specialist Group (pp. 392-402). Gland/Cambridge: IUCN.
(Article in monograph or in proceedings) -
Iongh, H.H., de & Weerd, M., van (2006)
The use of avian guilds for the monitoring of tropical forest disturbance by logging. Wageningen: Tropenbos International.
(Book (monograph)) -
Weerd, M., van & Ploeg, J., van der (2006)
Towards an ecosystem approach for the conservation of the Philippine crocodile. Final technical report to IUCN Small Grants Programme. Cabagan: Mabuwaya Foundation.
(External research report)
2005
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Weerd, M., van (2005)
Monitoring program Crocodile Rehabilitation, Observance and Conservation (CROC) Project. In DENR-PAWB, , CI, , Haribon Foundation, , FPE, (Eds.) Proceedings of the national biodiversity monitoring workshop (pp. 1-11). Manila: DENR-PAWB, CI, Haribon Foundation and FPE.
(Article in monograph or in proceedings) -
Iongh, H.H., de & Weerd, M., van (2005)
A pantropical review of the impact of logging on avian guilds, and avian guild composition in three rainforest sites including the Northern Sierra Madre Natural Park, Philippines. Sylvatrop, 15 (1-2), pp. 65-86.
(Article / Letter to editor) -
Ploeg, J., van der & Weerd, M., van (2005)
Contested crocodiles? Philippine crocodile conservation and indigenous peoples' rights in the Northern Sierra Madre. In: Ploeg, J., van der & Masipiquena, A.B. (Eds.), The future of the Sierra Madre; responding to social and ecological changes, pp. 339-362. Cabagan: Golden Press.
(Part of book or chapter of book) -
Weerd, M., van & Ploeg, J., van der (2005)
Continued Philippine crocodile conservation action in Northeast Luzon. Crocodile Specialist Group Newsletter, 24 (3), pp. 12-14.
(Article / Letter to editor) -
Ploeg, J., van der & Weerd, M., van (2005)
Crocodile, Rehabilitation, Observance and Conservation (CROC) project. Cabagan: CVPED.
(External research report) -
Weerd, M., van & Ploeg, J., van der (2005)
Ecosysteembenadering voor de bescherming van de Filippijnse krokodil. Ecologie & Ontwikkeling, 69, pp. 40-42.
(Article / Letter to editor) -
Oliveros, C. & Manalo, R. & Coñate Sr., E. & Tarun, B. & Telan, S. & Weerd, M., van (2005)
Philippine crocodile recorded on Dalupiri island. Crocodile Specialist Group Newsletter, 24 (3), pp. 14-15.
(Article / Letter to editor) -
Ploeg, J., van der & Weerd, M., van (2005)
The environment is not a crocodile: adopting an ecosystem approach for Philippine crocodile conservation in the municipality of San Mariano. Cabagan: CVPED.
(External research report)
2004
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Weerd, M., van & Ploeg, J., van der (2004)
A new future for the Philippine crocodile. Sylvatrop, 13 (1&2), pp. 31-50.
(Article / Letter to editor) -
Persoon, G.A. & Weerd, M., van (2004)
Biodiversity and resource management in Southeast Asian Islands. In Lee, K.J. & Tsai, H-M (Eds.) Islands of the World VIII: Changing Islands, Changing Worlds (pp. 65-97). Taipeh: National University Taiwan.
(Article in monograph or in proceedings) -
Weerd, M., van & Ploeg, J., van der (2004)
Conservation of the Phillipine crocodile Crocodylus mindorensis in North East Luzon, the Philippines. An update. In Crocodile Specialist Group, The (Ed.) Crocodile, Proceedings of the 17th working meeting of the Crocodile Specialist Group (pp. 277-283). Gland, Switzerland: IUCN.
(Article in monograph or in proceedings) -
Weerd, M., van & Ploeg, J., van der (2004)
Crocodile conservation action plan for the Northern Sierra Madre Natural Park. Cabagan: CVPED.
(External research report) -
Ploeg, J., van der & Weerd, M., van (2004)
Devolution of natural resource management and Philippine crocodile conservation in San Mariano, Isabela. Philippine Studies, 52 (3), pp. 346-383.
(Article / Letter to editor) -
Miranda, J.S.Q & Weerd, M., van & Ploeg, J., van der (2004)
Devolving crocodile conservation to the local level, the case of Philippine crocodile conservation in the municipality of San Mariano, Northeast Luzon, the Philippines. In Crocodile Specialist Group, The (Ed.) Crocodiles. Proceedings of the 17th working meeting of the Crocodile Specialist Group (pp. 309-316). Gland, Switzerland: IUCN.
(Article in monograph or in proceedings) -
Weerd, M., van (2004)
Het monster van de Sierra Madre. Kijk, 4, pp. 62-64.
(Article / Letter to editor) -
Weerd, M., van & Hutchinson, R. (2004)
Observations of Isabela Oriole Oriolus isabellae in the Sierra Madre, Luzon, the Philippines, with descriptions of the call. Forktail, 20, pp. 133-136.
(Article / Letter to editor) -
Weerd, M., van & Ploeg, J., van der (2004)
Surveys of wetlands and waterbirds in Cagayan Valley, Northern Luzon, Philippines. Forktail, 20, pp. 33-39.
(Article / Letter to editor) -
Weerd, M., van (2004)
T.R. - Agham Mindanao. Agham Mindanao
(Contribution for newspaper or weekly magazine) -
Tarun, B. & Guerrero, D. & Rodriguez, S. & Telan, M. & Weerd, M., van & Ploeg, J., van der (2004)
The current distribution and population size of the Philippine crocodile and Estuarine crocodile in Northeast Luzon, the Philippines. In Crocodile Specialist Group, The (Ed.) Crocodiles, Proceedings of the 17th working meeting of the Crocodile Specialist Group (pp. 166-173). Gland, Switzerland: IUCN.
(Article in monograph or in proceedings) -
Weerd, M., van & Strijk, J. & Snelder, D.J.R.M. (2004)
The importance of forest fragments for biodiversity conservation and local communities in Northeast Luzon, Philippines. Sylvatrop, 13 (1&2), pp. 1-30.
(Article / Letter to editor) -
Iongh, H.H., de & Weerd, M., van (2004)
The use of avian guilds for monitoring responses to human intervention in tropical forests of the Philippines. Pilipinas: a Journal of Philippine Studies, 43, pp. 92-104.
(Article / Letter to editor) -
Weerd, M., van & Boven, G., van & Ploeg, J., van der (2004)
Using communication to involve local communities and local governments in protected area management: two related cases from Northeastern Luzon, Philippines. In: Hamu, D. & Auchincloss, E. (Eds.), Communicating protected areas, pp. 139-154. Gland, Switzerland and Cambridge, UK: IUCN / Commission on Education and Communication.
(Part of book or chapter of book)
2003
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Weerd, M., van & Guerrero, J.P. & Tarun, B.A. & Rodriguez, D.G. (2003)
Coastal birds of the Northern Sierra Madre Natural Park. In Ploeg, J., van der, Masipiquena, A.B., Bernardo, E.C. (Eds.) The Sierra Madre Mountain Range: Global Relevance, Local Realities (pp. 63-74). Tuguegarao City: Golden Press.
(Article in monograph or in proceedings) -
Weerd, M., van & Ploeg, J., van der (2003)
Community-based Research, Observance and Conservation (CROC): a research project aimed at contributing to the conservation of the Philippine crocodile (Crocodylus mindorensis) in Northeast Luzon, the Philippines. Cabagan: CVPED.
(External research report) -
Weerd, M., van & General, A.A.G. (2003)
Conserving the Philippine crocodile in the Northern Sierra Madre: the results of three years research and conservation in action. In Ploeg, J., van der, Masipiquena, A.B., Bernardo, E.C. (Eds.) The Sierra Madre Mountain Range: Global Relevance, Local Realities (pp. 17-33). Tuguegarao City: Golden Press.
(Article in monograph or in proceedings) -
Weerd, M., van & Guerrero, J.P. & Tarun, B.A. & Rodriguez, D.G. (2003)
Flying foxes of Northern Sierra Madre Natural Park. In Ploeg, J., van der, Masipiquena, A.B., Bernardo, E.C. (Eds.) The Sierra Madre Mountain Range: Global Relevance, Local Realities (pp. 54-62). Tuguegarao City: Golden Press.
(Article in monograph or in proceedings) -
Ploeg, J., van der & Weerd, M., van (2003)
Last stronghold of the Philippine Crocodile. Haring Ibon, 1st quarte, pp. 31-34.
(Article / Letter to editor) -
Weerd, M., van (2003)
Mens en Krokodil leven samen op de Filippijnen. Ecologie en Ontwikkeling, 11 (2/3), pp. 15-17.
(Article / Letter to editor) -
Weerd, M., van & Ploeg, J., van der (2003)
Philippines. Crocodile Specialist Group Newsletter, 22 (1), pp. 8-11.
(Article / Letter to editor)
2002
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Weerd, M., van (2002)
The status and conservation of the Philippine crocodile Crocodylus mindorensis in the Northern Sierra Madre, Luzon, the Philippines. In Crocodile Specialist Group, The (Ed.) Crocodiles. Proceedings of the 16th working meeting of the Crocodile Specialist Group (pp. 97-107). Gland, Switzerland and Cambridge, UK: IUCN.
(Article in monograph or in proceedings)
