Waltert, Matthias

[["dc.bibliographiccitation.artnumber","8"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Artificial Societies and Social Simulation"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Le Page, Christophe"],["dc.contributor.author","Bobo, Kadiri Serge"],["dc.contributor.author","Kamgaing, Towa Olivier William"],["dc.contributor.author","Ngahane, Bobo Fernanda"],["dc.contributor.author","Waltert, Matthias"],["dc.date.accessioned","2018-11-07T10:01:52Z"],["dc.date.available","2018-11-07T10:01:52Z"],["dc.date.issued","2015"],["dc.description.abstract","An agent-based model (ABM) representing snare trapping of blue duikers (Cephalophus monticola) was co-designed and used with local populations to raise their awareness about the sustainability of bushmeat hunting activities in the region of the Korup National Park (South-West Cameroon). Village meetings based on interactive simulations with a stylized scale model were structured in three successive steps. During the first step, an abstract representation of a village surrounded by a portion of forest was co-designed by directly manipulating the computer interface displaying a spatial grid. Then, knowledge about the live-cycle traits and the behavior of blue duikers was shared through the demonstration of the individual-based population dynamics module of the ABM. The objective of the second step, introducing the hunting module of the ABM, was to elicit snare trapping practices through interactive simulation and to calibrate the hunting module by setting a value for the probability of a blue duiker to be caught by a snare trap. In a third step, a more realistic version of the ABM was introduced. The seven villages included in the process were located in the GIS-based spatial representation, and the number of 'Hunter' agents for each village in the ABM was set according to the results of a survey. The demonstration of this realistic version triggered discussion about possible management scenarios, whose results obtained with the finalized version of the ABM will be discussed during next round of village meetings. We present the pros and cons of the method consisting in using at an early stage of theprocess interactive simulations with stylized scale models to specify empirically-based agent-based models."],["dc.description.sponsorship","Volkswagen Foundation, Hanover, Germany"],["dc.identifier.isi","000354226700006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38120"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","J A S S S"],["dc.relation.issn","1460-7425"],["dc.title","Interactive Simulations with a Stylized Scale Model to Codesign with Villagers an Agent-Based Model of Bushmeat Hunting in the Periphery of Korup National Park (Cameroon)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","349"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Bird Conservation International"],["dc.bibliographiccitation.lastpage","362"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Abrahamczyk, Stefan"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Dwi Putra, Dadang"],["dc.contributor.author","Waltert, Matthias"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:42Z"],["dc.date.available","2017-09-07T11:50:42Z"],["dc.date.issued","2008-12"],["dc.description.abstract","In order to assess the potential value of differently managed cacao plantations for bird conservation on Sulawesi, we surveyed birds in near-primary forest (with limited timber and rattan extraction, and some hunting), cacao plantations with remnant forest trees and plantations lacking forest trees, from February to April 2007. A total of 16 50 x 50 m plots were visited twice and records of 87 species were obtained. Bird species richness and the number of endemics and forest specialists decreased along this gradient of forest conversion, with 20% of the forest specialists, among them 10 endemics, exclusively found in forest. Species composition changed dramatically between habitat types. Sørensen indices showed a similarity of species composition between forests and plantations of 45–60% for forest specialists and 65–71% for all species. The most important environmental variable for the diversity and composition of birds was the number of remnant rainforest trees present in the plantations. Our results suggest that large, undisturbed rainforest are most important for the conservation of forest specialists and endemics but that cacao plantations, if managed to maintain a high and diverse cover of forest trees, can harbour up to 60% of forest specialists and endemics."],["dc.identifier.doi","10.1017/s0959270908007570"],["dc.identifier.gro","3149871"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6578"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","0959-2709"],["dc.title","The value of differently managed cacao plantations for forest bird conservation in Sulawesi, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","201"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Journal of Zoology"],["dc.bibliographiccitation.lastpage","210"],["dc.bibliographiccitation.volume","302"],["dc.contributor.author","Lumetsberger, T."],["dc.contributor.author","Ghoddousi, A."],["dc.contributor.author","Appel, A."],["dc.contributor.author","Khorozyan, I."],["dc.contributor.author","Waltert, M."],["dc.contributor.author","Kiffner, C."],["dc.date.accessioned","2020-12-10T18:29:08Z"],["dc.date.available","2020-12-10T18:29:08Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1111/jzo.12449"],["dc.identifier.issn","0952-8369"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76537"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Re-evaluating models for estimating prey consumption by leopards"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","375"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Oryx"],["dc.bibliographiccitation.lastpage","379"],["dc.bibliographiccitation.volume","42"],["dc.contributor.author","Waltert, Matthias"],["dc.contributor.author","Abegg, Christophe"],["dc.contributor.author","Ziegler, Thomas"],["dc.contributor.author","Hadi, Susilo"],["dc.contributor.author","Priata, Dodi"],["dc.contributor.author","Hodges, Keith"],["dc.date.accessioned","2018-11-07T11:13:44Z"],["dc.date.available","2018-11-07T11:13:44Z"],["dc.date.issued","2008"],["dc.description.abstract","The island of Siberut in the Mentawai Archipelago, west of Sumatra, Indonesia, Supports four of the five primate species endemic to the Archipelago, all categorized as threatened on the IUCN Red List. As a baseline for future research on the ecology and conservation of Siberut's primates we used a line-transect approach to Survey primates in the Peleonan forest, site of the Siberut Conservation Project in northern Siberut. In 104 kin of Surveys we made a total of 391 observations of primates and estimated density and Population sizes for the Project's 10.7 km(2), main study site. Overall primate biomass density was estimated to be 697 kg km(-2) and abundances, in individuals km-2, were: pig-tailed snub-nosed langur Simias concolor, 53.1; Siberut macaque Macaca siberu, 16.2; Moss's gibbon Hylobates klossii, 8.9; Mentawai langur Presbytis potenziani, 8.2. These results confirm those from earlier studies that in undisturbed and unhunted primary forests S. concolor is more Successful than the sympatrically occurring P. potenziani. Results for all species suggest considerable population sizes on the island and underline its importance for the conservation of Mentawai primates."],["dc.identifier.doi","10.1017/S0030605308000793"],["dc.identifier.isi","000258862300014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53965"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cambridge Univ Press"],["dc.relation.issn","0030-6053"],["dc.title","Abundance and community structure of Mentawai primates in the Peleonan forest, north Siberut, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","327"],["dc.bibliographiccitation.lastpage","349"],["dc.contributor.author","Waltert, Matthias"],["dc.contributor.author","Langkau, Maike"],["dc.contributor.author","Maertens, Miet"],["dc.contributor.author","Härtel, Michael"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Mühlenberg, Michael"],["dc.contributor.editor","Gerold, Gerhard"],["dc.contributor.editor","Fremerey, M."],["dc.contributor.editor","Guhardja, Edi"],["dc.date.accessioned","2020-05-12T08:32:54Z"],["dc.date.available","2020-05-12T08:32:54Z"],["dc.date.issued","2004"],["dc.description.abstract","Tropical deforestation and forest fragmentation are probably the most serious threats to biodiversity (see Turner 1996) and it has been theoretically stated that even the largest protected areas in the tropics might be too small to sustain populations of all species of the original system (Terborgh 1999). But species loss in forest fragments is a complex process and appears often only after considerable time lags, especially in vertebrates (Brooks et al. 1999b). Therefore, empirical evidence for such extinctions can only be obtained from areas with a long deforestation history and long-known faunal composition (e.g. van Balen 1999). Such empirical data are scarce but are essential in order to convince land use managers of the long-term effects of forest loss on biodiversity. Species area models, however, are a valuable tool in the prediction of tropical vertebrate species loss (van Balen 1999; Brooks et al. 1997, 1999a, c, 2002; Cowlishaw 1999)."],["dc.identifier.doi","10.1007/978-3-662-08237-9_19"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65139"],["dc.language.iso","en"],["dc.publisher","Springer"],["dc.relation.eisbn","978-3-662-08237-9"],["dc.relation.isbn","978-3-642-05617-8"],["dc.relation.ispartof","Land Use, Nature Conservation and the Stability of Rainforest Margins in Southeast Asia. Environmental Science."],["dc.title","Predicting Losses of Bird Species from Deforestation in Central Sulawesi"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1339"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Conservation Biology"],["dc.bibliographiccitation.lastpage","1346"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Waltert, Matthias"],["dc.contributor.author","Mardiastuti, A."],["dc.contributor.author","Muhlenberg, M."],["dc.date.accessioned","2018-11-07T10:45:05Z"],["dc.date.available","2018-11-07T10:45:05Z"],["dc.date.issued","2004"],["dc.description.abstract","There is still much debate over the potential value of land-use systems for the maintenance of tropical biodiversity. An increasing number of studies indicate that much forest biodiversity can also be found in the agricultural landscape matrix. Because there is little information on the potential value of land-use systems for tropical forest bird species, we conducted repeated point counts in near-primary forest, adjacent young secondary forest, modernized cacao agroforestry systems, and annual cultures at submontane elevations in central Sulawesi, Indonesia. Species richness decreased from natural forest and young secondary forest to agroforestry systems and annual cultures. Although species richness was similar between natural and young secondary forest, the number of endemic bird species was significantly lower in second-growth forest. Species composition gradually changed as the habitat changed from natural to secondary forest, agroforestry systems, and annual cultures. Despite close proximity to near-primary forest, the agroforestry systems studied supported only a few small frugivorous-nectarivorous species. Our results suggest that secondary forest could play an important role in the conservation of many Sulawesi bird species, but, although suitable for colonization, its potential to sustain populations over the long term is unknown. Improvement of the landscape matrix for biodiversity conservation through secondary habitats therefore seems desirable to enlarge the ranges of forest species, but the fight against land conversion within protected areas of the region should be of much higher importance, at least at present."],["dc.identifier.doi","10.1111/j.1523-1739.2004.00127.x"],["dc.identifier.isi","000224071800019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/47416"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Blackwell Publishing Inc"],["dc.relation.issn","0888-8892"],["dc.title","Effects of land use on bird species richness in Sulawesi, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","223"],["dc.bibliographiccitation.journal","Biological Conservation"],["dc.bibliographiccitation.lastpage","229"],["dc.bibliographiccitation.volume","209"],["dc.contributor.author","Ghoddousi, Arash"],["dc.contributor.author","Soofi, Mahmood"],["dc.contributor.author","Hamidi, Amirhossein Khaleghi"],["dc.contributor.author","Lumetsberger, Tanja"],["dc.contributor.author","Egli, Lukas"],["dc.contributor.author","Ashayeri, Sheyda"],["dc.contributor.author","Khorozyan, Igor"],["dc.contributor.author","Kiabi, B. H."],["dc.contributor.author","Waltert, Matthias"],["dc.date.accessioned","2018-11-07T10:23:58Z"],["dc.date.available","2018-11-07T10:23:58Z"],["dc.date.issued","2017"],["dc.description.abstract","Overexploitation of wildlife for meat is a widespread phenomenon, which drives populations of many species toward extinction and may in turn affect large carnivores. Therefore, human hunters may compete with large carnivores over food resources and threaten their survival. In this study, we assessed the trophic competition of endangered Persian leopard with local poachers in Golestan National Park, Iran, where poaching has depleted populations of three ungulate species by 66-89% in the past decades. We compared leopard diet (77 scats) with prey offtake by poachers (75 poacher seizure records). In addition, we estimated prey abundance by line transect sampling (186 km), camera trapping (2777 camera days), double-observer point-counts (64 scans) and dung counts (38 km). Using interview surveys with local poachers, we also quantified their stated hunting preference. We documented a narrow hunting specialization of leopard (niche breadth 0.24) and poachers (niche breadth 0.19), and exclusivity (niche overlap 0.31) of their dietary/hunting niches, which suggest no exploitative competition between these two apex predators. This pattern likely results from the major role of wild boar in leopard diet. Due to religious beliefs, poachers avoid hunting this species and its population has increased in contrast to other ungulates. Considering the general avoidance of Suidae species across leopard range, depletion of alternative prey species may have resulted in a prey-switching strategy by leopard. The influence of religious beliefs and taboos on hunting preference and, consequently, on prey populations and predators' trophic niches shows the importance of incorporation of cultural beliefs in conservation practices. (C) 2017 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.biocon.2017.02.032"],["dc.identifier.isi","000404308600025"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42566"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Elsevier Sci Ltd"],["dc.relation.issn","1873-2917"],["dc.relation.issn","0006-3207"],["dc.title","When pork is not on the menu: Assessing trophic competition between large carnivores and poachers"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","85"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Biodiversity and Conservation"],["dc.bibliographiccitation.lastpage","105"],["dc.bibliographiccitation.volume","30"],["dc.contributor.author","Shokri, Shirko"],["dc.contributor.author","Jafari, Abbas"],["dc.contributor.author","Rabei, Korous"],["dc.contributor.author","Hadipour, Ehsan"],["dc.contributor.author","Alinejad, Hossein"],["dc.contributor.author","Zeppenfeld, Thorsten"],["dc.contributor.author","Soufi, Mobin"],["dc.contributor.author","Qashqaei, Ali"],["dc.contributor.author","Ahmadpour, Mohsen"],["dc.contributor.author","Zehzad, Bahram"],["dc.contributor.author","Kiabi, Bahram H."],["dc.contributor.author","Pavey, Chris R."],["dc.contributor.author","Balkenhol, Niko"],["dc.contributor.author","Waltert, Matthias"],["dc.contributor.author","Soofi, Mahmood"],["dc.date.accessioned","2021-04-14T08:30:45Z"],["dc.date.available","2021-04-14T08:30:45Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s10531-020-02077-4"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83359"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1572-9710"],["dc.relation.issn","0960-3115"],["dc.relation.orgunit","Abteilung Wildtierwissenschaften"],["dc.title","Conserving populations at the edge of their geographic range: the endangered Caspian red deer (Cervus elaphus maral) across protected areas of Iran"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","147"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Oryx"],["dc.bibliographiccitation.lastpage","151"],["dc.bibliographiccitation.volume","44"],["dc.contributor.author","Quintel, Michael"],["dc.contributor.author","Waltert, Matthias"],["dc.contributor.author","Syamsuri, Fauzan"],["dc.contributor.author","Hodges, J. Keith"],["dc.date.accessioned","2018-11-07T08:48:21Z"],["dc.date.available","2018-11-07T08:48:21Z"],["dc.date.issued","2010"],["dc.description.abstract","Although South-east Asia harbours most of the world's tropical peatlands relatively little is known about the primate communities of the associated habitat, the peat swamp forest. To understand better the role of tropical peat swamp forests for the conservation of primates in general, and for the endemic primates of the Mentawai Islands in particular, we conducted a line transect survey in a 12.5-km(2) section of peat swamp forest in northern Siberut. A total of 215 records of all four Siberut primates (Endangered Moss's gibbon Hylobates klossii, Endangered Mentawai langur Presbytis potenziani, Vulnerable Siberut macaque Macaca siberu and Critically Endangered pig-tailed langur Simias concolor) were obtained. Pig-tailed langurs (65.5 km(-2), 95% confidence interval, CI, 41.9-102.6) and Siberut macaques (35.8 km(-2), 95% CI 25.5-50.4) were the most common species, with density estimates similar to (pig-tailed langur) or greater than (Siberut macaque) those in adjacent lowland rainforest on mineral soil. Density estimates of the Mentawai langur (2.7 km(-2), 95% CI 1.3-5.3) and Kloss's gibbon (1.0 km(-2), 95% CI 0.3-2.8) were approximately one-third and one-tenth, respectively, of the adjacent lowland rainforest. Given that resource density and diversity in peat swamp forest are probably lower than that of lowland rainforest, primate densities appear to be relatively high, with overall primate biornass (881 kg km(-2)) exceeding values for lowland rainforest on mineral soil. Our results underline the general importance that peat swamp forests may have for South-east Asian primates and for two island endemic species in particular."],["dc.identifier.doi","10.1017/S0030605309990718"],["dc.identifier.isi","000274770200024"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21184"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cambridge Univ Press"],["dc.relation.issn","0030-6053"],["dc.title","Peat swamp forest supports high primate densities on Siberut Island, Sumatra, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","21"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","ECOTROPICA"],["dc.bibliographiccitation.lastpage","29"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Bobo, Kadiri Serge"],["dc.contributor.author","Waltert, Matthias"],["dc.date.accessioned","2018-11-07T09:01:07Z"],["dc.date.available","2018-11-07T09:01:07Z"],["dc.date.issued","2011"],["dc.description.abstract","Land use changes can dramatically impact bird populations: directly through habitat loss, but also indirectly through altered species interactions. In this study, we used 240 artificial ground and bush nests baited with chicken (Gallus gallus) eggs for eight days to assess levels of nest predation in an anthropogenic habitat mosaic in the Korup region, western Central Africa. Artificial nests were equally distributed among 24 plots within four distinct habitat types: (1) near-primary forest, (2) secondary forest, (3) agroforestry systems, and (4) annual crops. Similar to other artificial nest predation studies, we found a significantly higher predation rate of ground nests compared to bush nests: nearly one third (34/120, or 28%) of ground nests were plundered, whereas only 12% (14/120) of bush nests experienced predation. There was no effect of habitat type on predation rates of ground nor bush nests and we did not find relationships between vegetation parameters (bush cover and height) and predation rate. From observations of nest remains and animal footprints around depredated nests we roughly categorised animal predators into small- (mammal and reptile) and medium-sized (mammal and monitor lizard) predators. The proportion of cases of predation by medium-sized predators were larger than expected in secondary forest but lower in agroforestry systems and annual crops, while the opposite was the case for small-sized predators. Nest loss from direct human disturbance was recorded especially in agroforestry systems. Overall, human activities such as hunting and snaring of medium-sized mammalian predators as well as landscape context (forest matrix) may have been the primary determinants of the results of this study."],["dc.description.sponsorship","German Society for Tropical Ornithology (GTO); Volkswagen Foundation"],["dc.identifier.isi","000299143400003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/24340"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Soc Tropical Ecology, Gtoe, Zoological Research Inst & Muse"],["dc.relation.issn","0949-3026"],["dc.title","ARTIFICIAL BIRD NEST PREDATION ALONG A FOREST CONVERSION GRADIENT IN CAMEROON"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]