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Full Text in Pdf Format Vol. 43: 89–98, 2020 ENDANGERED SPECIES RESEARCH Published September 17 https://doi.org/10.3354/esr01055 Endang Species Res OPEN ACCESS Assessment of the threatened carnivore community in the recently expanded rainforest protected area Anjanaharibe-Sud Special Reserve, Madagascar Patrick H. Ross1,*, Erik Patel2, Barry Ferguson3, Rojo Nandrianina Ravelijaona4, Guy Irenel Raoloniana2, Erin Wampole5, Brian D. Gerber5, Zach J. Farris6 1Department of Sustainable Development, Appalachian State University, Living Learning Center, 305 Bodenheimer Drive, Boone, NC 28608, USA 2Research and Conservation, Lemur Conservation Foundation, PO Box 249, Myakka City, FL 34251, USA 3Independent Researcher, Antalaha (206), SAVA, Madagascar 4Department of Biology, University of Antananarivo, Antananarivo 101, Madagascar 5Department of Natural Resources Science, University of Rhode Island, Kingston, RI 02881, USA 6Department of Health and Exercise Science, Appalachian State University, Leon Levine Hall of Health Sciences, ASU Box 32071, 1179 State Farm Road, Suite 432, Boone, NC 28608, USA ABSTRACT: Madagascar is an island nation renowned for its biodiversity and species endemism, yet it is still largely understudied despite intense anthropogenic threats including forest loss and edge effects. Anjanaharibe-Sud Special Reserve is a recently expanded rainforest protected area that is lacking detailed surveys and assessments of the native carnivore community of the endemic family Eupleridae. To identify which terrestrial carnivores occupy the reserve and what anthro- pogenic disturbances and factors best explain their occurrence patterns, we deployed 35 motion- activated cameras to detect native and introduced carnivores. From November 2018 to February 2019, we collected 2918 unique capture events (all species) and confirmed the presence of 5 eup- lerids: Galidia elegans, Galidictis fasciata, Eupleres goudotii, Fossa fossana, and Cryptoprocta ferox. These results extend the known range of E. goudotii and G. fasciata. In the reserve, F. fossana and G. elegans were the most common and widespread native carnivores, while E. goudotii was the rarest. We highlight the negative impact of edge effects on G. fasciata and F. fossana and the threat posed by the free-ranging non-native carnivore C. familiaris. This study represents the first detailed survey and occurrence estimates of the carnivore community of this protected area, allow- ing comparison with other protected areas in Madagascar. Our empirical findings show that anthro- pogenic disturbance negatively impacts carnivore existence within the Anjanaharibe-Sud Special Reserve and provide important management recommendations for protecting the carnivore com- munity and the co-occurring wildlife living within this area. KEY WORDS: Camera trapping ∙ Edge effects ∙ Free-ranging dogs ∙ Non-native species ∙ Occupancy 1. INTRODUCTION United Nations estimating an average net forest loss of 7 000 000 ha yr−1 between 2000 and 2010 (FAO Tropical rainforests cover only 7% of the land on 2016). Rainforests everywhere face a wide range Earth yet contain approximately 50% of global spe- of anthropogenic threats, including infrastructure cies diversity (Hanley et al. 1995). These biodi - and agricultural expansion as well as resource ex - verse forests are highly threatened globally, with the traction (Geist & Lambin 2002). These pressures © The authors 2020. Open Access under Creative Commons by *Corresponding author: [email protected] Attribution Licence. Use, distribution and reproduction are un - restricted. Authors and original publication must be credited. Publisher: Inter-Research · www.int-res.com 90 Endang Species Res 43: 89–98, 2020 result in overall forest loss and confounding threats, as habitat loss (Vielledent et al. 2018, Morelli et al. such as edge effects. Edge effects are those effects 2020), hunting (Golden 2009, Jenkins et al. 2011), felt by organisms that occur near and are caused by human encroachment, competition with non-native the boundary of 2 or more habitats (Levin 2009). species, and disease transmission (Farris et al. Edge effects can result in microclimate changes that 2015a,b, Rasambainarivo et al. 2017). Recent re - alter and influence population and/or community search on Madagascar’s carnivores has highlighted structures for both flora and fauna occupying the how forest loss, degradation, and human encroach- affected area (Lenz et al. 2014). These edge effects ment have negatively influenced carnivores across have been shown to negatively affect wildlife across degraded and edge forest in both single-season and multiple taxa throughout the tropics (Koh et al. 2010). multi-season surveys (Gerber et al. 2012, Farris et al. While forest loss (and added pressures such as edge 2015a, 2017). Data on multiple species of carnivores effects) occurs globally, it has especially damaging have demonstrated lower occupancy and/ or density impacts on locations with the densest concentrations in edge habitat near human settlements. These edge of biodiversity (or ‘biodiversity hotspots’), many of and disturbed forest habitats are also associated with which lie near the equator (Myers 1988, Brown increased presence and activity of non-native inva- 2014). sive species, namely free-ranging cats and dogs. Madagascar, an island nation located off the Recent research has shown the numerous threats coast of southeast mainland Africa, is estimated posed to Madagascar’s native/ endemic carnivores by to have one of the densest concentrations of bio- free-ranging dogs (Canidae Canis familiaris) and diversity globally (Mittermeier et al. 1998). Almost cats (Felidae Felis catus) as well as the small Indian half of Madagascar’s forest cover has been lost in civet (Viverridae Viverricula indica). Traits associ- the last 60 yr; the remaining forest is expected to ated with carnivores, including their elusive behav- be lost in the next 80 yr if the annual deforesta- ior, often nocturnal activity, large home ranges, and tion rate of 99 000 ha yr−1 (2010−2014) continues low population densities, have made it particularly (Vieilledent et al. 2018, Morelli et al. 2020). The difficult to gather reliable estimates. The culmination primary threat to Madagascar’s forests and its of these threats and the lack of robust studies have threatened wildlife is land clearing related to contributed to Madagascar’s carnivores being some ‘tavy’ (a traditional practice using fire to clear for of the most threatened and least studied carnivores agriculture), along with timber and/or charcoal on the planet (Brooke et al. 2014). production (Vieilledent et al. 2018). In an attempt To provide more information on this poorly stud- to protect the nation’s threatened biodiversity and ied, highly threatened group of carnivores, we con- endemic species, the Malagasy Government and ducted widespread, non-invasive surveys across a the Ministry of the Environment and Forests have newly expanded protected area to investigate habi- ex panded existing protected areas. Unfortunately, tat use and factors influencing their distribution. most of Madagascar’s protected areas are under- We predicted that various anthropogenic variables studied and lack robust population density esti- such as forest degradation level and distance to mates and/or diversity assessments of threatened human settlement and forest edge will have sub- wildlife populations, which limits efforts to man- stantial negative impacts on the native rainforest age and conserve these protected areas and the carnivore occupancy and/or habitat use in the biodiversity they aim to protect (Goodman et al. Anjanaharibe-Sud Special Reserve (ASSR) in north- 2018). eastern Madagascar. To test this hypothesis, our Tropical carnivores are often ecosystem regulators objectives were to (1) survey and document the and indicators of environmental health (Miller et al. presence of native and non-native carnivores; (2) 2001). These carnivores may also be effective conser- calculate and compare site-level trap success (TS, vation ‘umbrella species’, as the effective manage- e.g. relative animal activity) of each carnivore as ment of their habitat confers protection on numerous well as co-occurring species; (3) estimate the prob- other biota in their ecosystems (Noss 1990, Gittleman ability of species occupancy and detection; and (4) et al. 2001). The concept of carnivores as umbrella evaluate which landscape and habitat features (e.g. species has been shown to increase species richness, distance to edge, distance to village, and forest inter-order variability, population viability, and con- type) influence their occupancy and detection. To nectivity (Thornton et al. 2016, Figel et al. 2018). evaluate these predictions, we plotted all camera Madagascar’s endemic carnivores (Family Eupleri- sites by their GPS coordinate locations in Google dae) face numerous anthropogenic pressures, such Earth Pro (Google). Ross et al.: Anthropogenic threats to carnivores in Madagascar 91 2. MATERIALS AND METHODS ASSR is connected to Ma rojejy National Park, a UN- ESCO World Heritage Site, through the forest corridor 2.1. Study area making up the COMATSA-Sud protected area. Taken together, the ‘Marojejy National Park Protected We conducted our study in northeastern Madagas- Area Complex’ is one of the largest and least car, inside ASSR around the Camp Indri site (14° 44’ disturbed rainforest landscapes in Madagascar (Good- 29’’ S, 49° 29’ 50’’ E) in the SAVA Region (Fig. 1). ASSR man 1998, Goodman et al. 2018). lies
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