scholarly journals Wildlife trail or systematic? Camera trap placement has little effect on estimates of mammal diversity in a tropical forest in Gabon

2020 ◽  
Author(s):  
Davy Fonteyn ◽  
Cédric Vermeulen ◽  
Nicolas Deflandre ◽  
Daniel Cornelis ◽  
Simon Lhoest ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Camera Trap ◽  
Mammal Diversity ◽  
Trap Placement

scholarly journals Random versus Game Trail-Based Camera Trap Placement Strategy for Monitoring Terrestrial Mammal Communities

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0126373 ◽  
Author(s):  
Jeremy J. Cusack ◽  
Amy J. Dickman ◽  
J. Marcus Rowcliffe ◽  
Chris Carbone ◽  
David W. Macdonald ◽  
...  
Keyword(s):  
Camera Trap ◽  
Terrestrial Mammal ◽  
Mammal Communities ◽  
Trap Placement

scholarly journals Author Correction: Camera trap placement for evaluating species richness, abundance, and activity

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Kamakshi S. Tanwar ◽  
Ayan Sadhu ◽  
Yadvendradev V. Jhala
Keyword(s):  
Species Richness ◽  
Camera Trap ◽  
Trap Placement

scholarly journals Tropical mammal functional diversity increases with productivity but decreases with anthropogenic disturbance

2021 ◽  
Vol 288 (1945) ◽  
pp. 20202098
Author(s):  
Daniel Gorczynski ◽  
Chia Hsieh ◽  
Jadelys Tonos Luciano ◽  
Jorge Ahumada ◽  
Santiago Espinosa ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Observational Data ◽  
Functional Diversity ◽  
Primary Productivity ◽  
Positive Association ◽  
Camera Trap ◽  
Tropical Regions ◽  
Functional Richness ◽  
Functional Dispersion ◽  
Mammal Communities

A variety of factors can affect the biodiversity of tropical mammal communities, but their relative importance and directionality remain uncertain. Previous global investigations of mammal functional diversity have relied on range maps instead of observational data to determine community composition. We test the effects of species pools, habitat heterogeneity, primary productivity and human disturbance on the functional diversity (dispersion and richness) of mammal communities using the largest standardized tropical forest camera trap monitoring system, the Tropical Ecology Assessment and Monitoring (TEAM) Network. We use occupancy values derived from the camera trap data to calculate occupancy-weighted functional diversity and use Bayesian generalized linear regression to determine the effects of multiple predictors. Mammal community functional dispersion increased with primary productivity, while functional richness decreased with human-induced local extinctions and was significantly lower in Madagascar than other tropical regions. The significant positive relationship between functional dispersion and productivity was evident only when functional dispersion was weighted by species' occupancies. Thus, observational data from standardized monitoring can reveal the drivers of mammal communities in ways that are not readily apparent from range map-based studies. The positive association between occupancy-weighted functional dispersion of tropical forest mammal communities and primary productivity suggests that unique functional traits may be more beneficial in more productive ecosystems and may allow species to persist at higher abundances.

scholarly journals Small mammal diversity along two neighboring Bornean mountains

2018 ◽  
Author(s):  
Melissa T. R. Hawkins ◽  
Miguel Camacho-Sanchez ◽  
Fred Tuh Yit Yuh ◽  
Jesus E Maldonado ◽  
Jennifer A Leonard
Keyword(s):  
Species Richness ◽  
Success Rate ◽  
Elevational Gradient ◽  
Camera Trap ◽  
High Turnover ◽  
Evolutionary Origins ◽  
Diversity Gradient ◽  
History Of ◽  
Climatic History ◽  
Mammal Diversity

Biodiversity across elevational gradients generally follows patterns, the evolutionary origins of which are debated. We trapped small non-volant mammals across an elevational gradient on Mount (Mt.) Kinabalu (4,101 m) and Mt. Tambuyukon (2,579 m), two neighboring mountains in Borneo, Malaysia. We also included visual records and camera trap data from Mt. Tambuyukon. On Mt. Tambuyukon we trapped a total of 299 individuals from 23 species in 6,187 trap nights (4.8% success rate). For Mt. Kinabalu we trapped a total 213 animals from 19 species, in 2,044 trap nights, a 10.4% success rate. We documented the highest diversity in the low elevations for both mountains, unlike previous less complete surveys which supported a mid-elevation diversity bulge on Mt. Kinabalu. Species richness decreased gradually towards the highlands to a more even community with different species (high turnover), less rich but with the highest levels of endemism. These patterns suggest that an interplay of topography and climatic history of the region were drivers of the diversity gradient, in addition to standing climatic and spatial hypothesis.

scholarly journals Stronger together: comparing and integrating camera trap, visual, and dung survey data in tropical forest communities

Ecosphere ◽  
2019 ◽  
Vol 10 (12) ◽  
Author(s):  
Chase L. Nuñez ◽  
Graden Froese ◽  
Amelia C. Meier ◽  
Chris Beirne ◽  
Johanna Depenthal ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Survey Data ◽  
Camera Trap ◽  
Forest Communities

scholarly journals Mammal diversity among vertical strata and the evaluation of a survey technique in a central Amazonian forest

2021 ◽  
Vol 61 ◽  
pp. e20216133
Author(s):  
Alexander Roldán Arévalo-Sandi ◽  
André Luis Sousa Gonçalves ◽  
Kota Onizawa ◽  
Tsuneaki Yabe ◽  
Wilson Roberto Spironello
Keyword(s):  
Camera Trap ◽  
Camera Traps ◽  
Sampling Effort ◽  
Mammal Species ◽  
Lowland Forest ◽  
Survey Technique ◽  
Terrestrial Habitats ◽  
Common Technique ◽  
The Difference ◽  
Mammal Diversity

Mammal groups have a vast variety of habitats, which include aquatic, aerial, arboreal, and terrestrial. For terrestrial habitats, camera traps are used as a common technique to record mammals and other vertebrates and have been recently utilized to observe arboreal animals as well. Here, we compare the difference in mammal diversity between floor and canopy strata and evaluate the use of camera trapping in a lowland forest in central Amazon. We installed nine paired camera traps, one in the canopy stratum and other in the floor stratum, in the Alto Cuieiras Biological Reserve (Brazilian Amazon). With a sampling effort of 720 camera-days, we recorded 30 mammal species: nine in canopy strata, 14 in floor strata, and seven in scansorial strata (sharing both strata). On the forest floor, the species with the greatest abundance was Myoprocta acouchy; in the canopy, Isothrix paguros had the greatest abundance; and among the scansorial species, Proechymis sp. was the most abundant. Our results show the differences in mammal diversity between floor and canopy strata; canopy strata contained more small and frugivorous mammals. Although we obtained a relatively low sampling effort with the camera-trap method compared with other studies utilizing different techniques, our results were especially similar to those of previous studies that worked with canopy and floor strata. Thus, camera trap can be very effective for recording short periods of time, and this method is less physically exhaustive and expensive for researchers to study vertical strata.

scholarly journals Small mammal diversity along two neighboring Bornean mountains

2018 ◽  
Author(s):  
Melissa T. R. Hawkins ◽  
Miguel Camacho-Sanchez ◽  
Fred Tuh Yit Yuh ◽  
Jesus E Maldonado ◽  
Jennifer A Leonard
Keyword(s):  
Species Richness ◽  
Success Rate ◽  
Elevational Gradient ◽  
Camera Trap ◽  
High Turnover ◽  
Evolutionary Origins ◽  
Diversity Gradient ◽  
History Of ◽  
Climatic History ◽  
Mammal Diversity

Biodiversity across elevational gradients generally follows patterns, the evolutionary origins of which are debated. We trapped small non-volant mammals across an elevational gradient on Mount (Mt.) Kinabalu (4,101 m) and Mt. Tambuyukon (2,579 m), two neighboring mountains in Borneo, Malaysia. We also included visual records and camera trap data from Mt. Tambuyukon. On Mt. Tambuyukon we trapped a total of 299 individuals from 23 species in 6,187 trap nights (4.8% success rate). For Mt. Kinabalu we trapped a total 213 animals from 19 species, in 2,044 trap nights, a 10.4% success rate. We documented the highest diversity in the low elevations for both mountains, unlike previous less complete surveys which supported a mid-elevation diversity bulge on Mt. Kinabalu. Species richness decreased gradually towards the highlands to a more even community with different species (high turnover), less rich but with the highest levels of endemism. These patterns suggest that an interplay of topography and climatic history of the region were drivers of the diversity gradient, in addition to standing climatic and spatial hypothesis.

scholarly journals Camera trap placement and the potential for bias due to trails and other features

PLoS ONE ◽  
2017 ◽  
Vol 12 (10) ◽  
pp. e0186679 ◽  
Author(s):  
Joseph M. Kolowski ◽  
Tavis D. Forrester
Keyword(s):  
Camera Trap ◽  
Trap Placement

scholarly journals Estimating Leopard Cat Prionailurus bengalensis Kerr, 1792 (Carnivora: Felidae) density in a degraded tropical forest fragment in northeastern Thailand

2019 ◽  
Vol 11 (4) ◽  
pp. 13448-13458 ◽  
Author(s):  
Wyatt Joseph Petersen ◽  
Tommaso Savini ◽  
Robert Steinmetz ◽  
Dusit Ngoprasert
Keyword(s):  
Tropical Forest ◽  
Camera Trap ◽  
Evergreen Forest ◽  
Forest Fragment ◽  
Dipterocarp Forest ◽  
Dry Evergreen Forest ◽  
Leopard Cat ◽  
Prionailurus Bengalensis ◽  
Dry Dipterocarp Forest ◽  
Northeastern Thailand

The Leopard Cat Prionailurus bengalensis is thought to be Asia’s most abundant wild cat.  Yet, the species’ status is poorly known due to a lack of rigorous population estimates.  Based on the few studies available, Leopard Cats appear to be more abundant in degraded forests, potentially due to increased prey availability.  We conducted camera trap surveys, rodent live-trapping, and spatially-explicit capture-recapture analyses to estimate the density of Leopard Cats within a degraded tropical forest fragment (148km2) in northeastern Thailand.  A total effort of 12,615 camera trap nights across 65km2 of trapping area resulted in at least 25 uniquely identified individuals.  Average rodent biomass (the main prey of Leopard Cats) was highest in the dry evergreen forest (469.0g/ha), followed by dry dipterocarp forest (287.5g/ha) and reforested areas (174.2g/ha).  Accordingly, Leopard Cat densities were highest in the dry evergreen forest with 21.42 individuals/100km2, followed by the reforested areas with 7.9 individuals/100km2.  Only two detections came from the dry dipterocarp forest despite both an extensive survey effort (4,069 trap nights) and available prey.  Although the dipterocarp supported the second highest average rodent biomass, it lacked a key prey species, Maxomys surifer, possibly explaining low encounter rates in that habitat.  Our results provide important baseline information concerning the population status of Leopard Cat in southeastern Asia.  Further, our findings corroborate with other studies that found a tolerance among Leopard Cats for degraded forests, highlighting the potential for forest fragments to serve as long-term conservation areas for the species.

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