scholarly journals Replacement of native by non-native animal communities assisted by human introduction and management on Isla Victoria, Nahuel Huapi National Park

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1328 ◽  
Author(s):  
Valeria L. Martin-Albarracin ◽  
Martin A. Nuñez ◽  
Guillermo C. Amico
Keyword(s):  
Native Species ◽  
National Park ◽  
Bird Species ◽  
Fallow Deer ◽  
Camera Trapping ◽  
Terrestrial Mammals ◽  
Species Abundances ◽  
Small Bird ◽  
Animal Communities ◽  
Nahuel Huapi National Park

One of the possible consequences of biological invasions is the decrease of native species abundances or their replacement by non-native species. In Andean Patagonia, southern Argentina and Chile, many non-native animals have been introduced and are currently spreading. On Isla Victoria, Nahuel Huapi National Park, many non-native vertebrates were introduced ca. 1937. Records indicate that several native vertebrates were present before these species were introduced. We hypothesize that seven decades after the introduction of non-native species and without appropriate management to maintain native diversity, non-native vertebrates have displaced native species (given the known invasiveness and impacts of some of the introduced species). We conducted direct censuses in linear transects 500 m long (n= 10) in parallel with camera-trapping (1,253 camera-days) surveys in two regions of the island with different levels of disturbance: high (n= 4) and low (n= 6) to study the community of terrestrial mammals and birds and the relative abundances of native and non-native species. Results show that currently non-native species are dominant across all environments; 60.4% of census records and 99.7% of camera trapping records are of non-native animals. We detected no native large mammals; the assemblage of large vertebrates consisted of five non-native mammals and one non-native bird. Native species detected were one small mammal and one small bird. Species with the highest trapping rate were red and fallow deer, wild boar, silver pheasant (all four species are non-native) and chucao (a native bird). These results suggest that native species are being displaced by non-natives and are currently in very low numbers.

scholarly journals Replacement of native by non-native animal communities assisted by human introduction and management on Isla Victoria, Nahuel Huapi National Park

2015 ◽  
Author(s):  
Valeria L Martin-Albarracin ◽  
Martin A Nuñez ◽  
Guillermo C Amico
Keyword(s):  
Native Species ◽  
National Park ◽  
Bird Species ◽  
Fallow Deer ◽  
Camera Trapping ◽  
Terrestrial Mammals ◽  
Species Abundances ◽  
Small Bird ◽  
Animal Communities ◽  
Nahuel Huapi National Park

One of the possible consequences of biological invasions is the decrease of native species abundances or their replacement by non-native species. In Andean Patagonia, southern Argentina and Chile, many non-native animals have been introduced and are currently spreading. On Isla Victoria, Nahuel Huapi National Park, many non-native vertebrates were introduced ca. 1937. Records indicate that several native vertebrates were present before these species were introduced. We hypothesize that seven decades after the introduction of non-native species and without appropriate management to maintain native diversity, non-native vertebrates have displaced native species -given the known invasiveness and impacts of some of the introduced species-. We conducted direct censuses in linear transects 500m long (n=10) in parallel with camera-trapping (1253 camera-days) surveys in two regions of the island with different levels of disturbance: high (n=4) and low (n= 6) to study the community of terrestrial mammals and birds and the relative abundances of native and non-native species. Results show that currently non-native species are dominant across all environments; 60.4% of census records and 99.7% of camera trapping records are of non-native animals. We detected no native large mammals; the assemblage of large vertebrates consisted of five non-native mammals and one non-native bird. Native species detected were one small mammal and one small bird. Species with a highest trapping rate were red and fallow deer, wild boar, silver pheasant (the four species non-native) and chucao (a native bird). These results suggest that native species are being displaced by non-natives and are currently in very low numbers.

scholarly journals Replacement of native by non-native animal communities assisted by human introduction and management on Isla Victoria, Nahuel Huapi National Park

2015 ◽  
Author(s):  
Valeria L Martin-Albarracin ◽  
Martin A Nuñez ◽  
Guillermo C Amico
Keyword(s):  
Native Species ◽  
National Park ◽  
Bird Species ◽  
Fallow Deer ◽  
Camera Trapping ◽  
Terrestrial Mammals ◽  
Species Abundances ◽  
Small Bird ◽  
Animal Communities ◽  
Nahuel Huapi National Park

One of the possible consequences of biological invasions is the decrease of native species abundances or their replacement by non-native species. In Andean Patagonia, southern Argentina and Chile, many non-native animals have been introduced and are currently spreading. On Isla Victoria, Nahuel Huapi National Park, many non-native vertebrates were introduced ca. 1937. Records indicate that several native vertebrates were present before these species were introduced. We hypothesize that seven decades after the introduction of non-native species and without appropriate management to maintain native diversity, non-native vertebrates have displaced native species -given the known invasiveness and impacts of some of the introduced species-. We conducted direct censuses in linear transects 500m long (n=10) in parallel with camera-trapping (1253 camera-days) surveys in two regions of the island with different levels of disturbance: high (n=4) and low (n= 6) to study the community of terrestrial mammals and birds and the relative abundances of native and non-native species. Results show that currently non-native species are dominant across all environments; 60.4% of census records and 99.7% of camera trapping records are of non-native animals. We detected no native large mammals; the assemblage of large vertebrates consisted of five non-native mammals and one non-native bird. Native species detected were one small mammal and one small bird. Species with a highest trapping rate were red and fallow deer, wild boar, silver pheasant (the four species non-native) and chucao (a native bird). These results suggest that native species are being displaced by non-natives and are currently in very low numbers.

scholarly journals Camera-trapping survey to assess diversity, distribution and photographic capture rate of terrestrial mammals in the aftermath of the ethnopolitical conflict in Manas National Park, Assam, India

2018 ◽  
Vol 10 (8) ◽  
pp. 12008 ◽  
Author(s):  
Dipankar Lahkar ◽  
M. Firoz Ahmed ◽  
Ramie H. Begum ◽  
Sunit Kumar Das ◽  
Bibhuti Prasad Lahkar ◽  
...  
Keyword(s):  
National Park ◽  
Mammalian Species ◽  
Capture Rate ◽  
Political Conflict ◽  
Camera Trapping ◽  
Terrestrial Mammals ◽  
Independent Events ◽  
Key Species ◽  
Almost All ◽  
Capture Rates

 Information on the presence and distribution of species is crucial for conservation planning and management within a region.  Documentation of species assemblages in Manas National Park (MNP) in the aftermath of conflict is critical for informed conservation interventions.  For nearly two decades (1990–2010), conservation efforts in MNP were compromised by ethno−political conflict.  We conducted camera trapping surveys of terrestrial mammals across three administrative forest ranges (Panbari, Bansbari and Bhuyanpara) of MNP in 2017.  A systematic survey with 118 trap locations accumulated data over 6,173 trap-days.  We obtained 21,926 photographs of mammals belonging to 13 families and 25 species, of which 13 are threatened.  We calculated photographic capture rate index (PCRI) using independent events.  Trap specific PCRI’s were used to map the spatial variation in capture rates.  We observed variation in capture rate between Bansbari-Bhuyanpara where conflict ended in 2003 and has remained peaceful, and Panbari, a forest range where conflict ended later in 2016.  Our results further indicate lower capture rates of mammalian prey species and small felids, but higher capture rates of four large carnivores in Panbari as opposed to Bansbari-Bhuyanpara.  These results highlighted the fact that despite a history of ethno-political conflict in the region, although almost all mammalian species expected to occur in the park were detected and confirmed, present evidence indicated ethno-political conflict influences the distribution of several key species.  In depth studies assessing mammalian prey densities, distribution and density are required to further understand the effects of conflict. 

A comparison of the effectiveness of camera trapping and live trapping for sampling terrestrial small-mammal communities

2010 ◽  
Vol 37 (6) ◽  
pp. 456 ◽  
Author(s):  
Natasha De Bondi ◽  
John G. White ◽  
Mike Stevens ◽  
Raylene Cooke
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
National Park ◽  
Cost Effective ◽  
Camera Trapping ◽  
Terrestrial Mammals ◽  
Live Trapping ◽  
Spatial Coverage ◽  
Presence Data ◽  
The Cost

Context. There is an increasing reliance on the use of camera-trap technologies for surveys of medium to large terrestrial mammals. Camera trapping may, however, also have significant applications for broad-scale surveys of small mammals. Aims. The present study aims to compare results from camera-trapping surveys to those of the more traditional live-trapping techniques. Specifically, it aims to test the effectiveness of the techniques for detecting species, and the cost effectiveness of both approaches. Methods. Surveys were conducted across 36 sites in the Grampians National Park, Victoria, Australia, between April and July 2009. At each site, independent surveys were conducted for small mammals by using a combination of Elliot and cage trapping, then camera trapping. Results for the two different approaches were compared for both their ability to generate small-mammal presence data and their cost effectiveness. Key results. Camera-trapping surveys of 36 sites in the Grampians National Park compared favourably with those of live-trapping surveys. Similar species were detected across the sites, and camera trapping was a considerably more cost effective than live trapping. Conclusions. Camera-trapping surveys of small terrestrial mammals may provide a new and cost-effective technique for surveying terrestrial small mammals. This is particularly the case when presence data are the main requirement of the survey, with no requirement to capture and tag animals. Implications. Given the cost-effective nature of camera trapping, there is potential to use this approach to increase the level of replication and spatial coverage of small-mammal surveys. Improving the replication and spatial coverage of studies has the potential to significantly increase the scope of research questions that can be asked, thus providing the potential to improve wildlife management.

scholarly journals Wildlife inventory from camera-trapping surveys in the Azores (Pico and Terceira islands)

2020 ◽  
Vol 8 ◽  
Author(s):  
Lucas Lamelas-Lopez ◽  
Xose Pardavila ◽  
Isabel Amorim ◽  
Paulo Borges
Keyword(s):  
Bird Species ◽  
Large Data ◽  
Camera Traps ◽  
Camera Trapping ◽  
Data Series ◽  
Mammal Species ◽  
Terrestrial Mammals ◽  
Cory’S Shearwater ◽  
Native Birds ◽  
The Impact

The present publication provides a dataset from five camera-trapping sampling campaigns on two islands of the Azorean archipelago (Pico and Terceira islands), between 2013-2018. This dataset was obtained as a by-product of campaigns designed for different purposes. The sampling campaigns were designed to: (i) study the ecology of introduced mammals; (ii) assess the impact of introduced mammals on native birds (Azores woodpigeon - Columba palumbus azorica and Cory's shearwater - Calonectris diomeda borealis), through nest predation; and (iii) obtain information about the impact of vertebrates on agricultural systems, particularly on Azorean traditional vineyards. A total of 258 sites and 47 nests were sampled using camera traps. These sampling campaigns provided a large data series that allowed the creation of a vertebrate wildlife inventory. We obtained a total of 102,095 camera-trap records, which allowed us to to identify 30 species of vertebrates: one amphibian, one reptile, 17 birds and ten mammal species. This represented 100% of the amphibians and terrestrial mammals, 58% of the breeding birds and 50% of the reptile species known for Pico and/or Terceira islands. Concerning the colonisation status of the species, we recorded 15 indigenous (native non-endemic or endemic) and three introduced bird species; all known terrestrial amphibians, reptiles and mammals in the Azores are introduced species. The data collected contribute to increasing knowledge on the distribution of vertebrate species on Pico and Terceira islands, where most existing records of some species were only available to Island level (e.g. mustelids and hedgehogs). None of the identified species was previously unknown to the study area.

scholarly journals The diversity of large- and medium-sized terrestrial mammals and birds in the Giant Panda National Park: A meta-analysis based on camera-trapping data

2021 ◽  
Vol 29 (11) ◽  
pp. 1490-1504
Author(s):  
Jia Tian ◽  
Shuyi Zhu ◽  
Xiaofeng Zhang ◽  
Liwen He ◽  
Xiaodong Gu ◽  
...  
Keyword(s):  
National Park ◽  
Giant Panda ◽  
Meta Analysis ◽  
Camera Trapping ◽  
Terrestrial Mammals

scholarly journals Wildlife Diversity and Relative Abundance among a Variety of Adjacent Protected Areas in the Northern Talamanca Mountains of Costa Rica

Diversity ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 134 ◽  
Author(s):  
Carolina Sáenz-Bolaños ◽  
Todd K. Fuller ◽  
Eduardo Carrillo J.
Keyword(s):  
Costa Rica ◽  
Protected Areas ◽  
Relative Abundance ◽  
Human Activities ◽  
National Park ◽  
Bird Species ◽  
Camera Traps ◽  
Conservation Strategy ◽  
Species Abundances ◽  
Indigenous Territories

Protected areas are intended to achieve the long-term conservation of nature, but not all such areas are equal in their effectiveness because of their varying regulation of human activities. In Costa Rica, we assessed mammal and bird species presence and relative abundance in three protected areas in the northern Talamanca Mountains. In this humid tropical forest area, we placed camera traps in an adjacent national park, forest reserve, and indigenous territories, each with a different mix of human activities. In 10,120 trap nights, we obtained 6181 independent photos of mostly mammals (34 species other than humans) and birds (34 species). Species with greater abundance or only occurrence in the national park were mammals and birds commonly hunted outside of the park, large carnivores rarely documented in other areas, and poachers. Species found more often outside of the park were medium-sized mammals, some birds, and domestic mammals. We conclude that even in the same ecological area, varying regulations related to type of protected area have significant effects on some mammal and bird species abundances and occurrences, and thus need to be considered when assessing the overall effectiveness of protection as a conservation strategy.

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