Human disturbance is the most limiting factor driving habitat selection of a large carnivore throughout Continental Europe

2022 ◽  
Vol 266 ◽  
pp. 109446
Author(s):  
Lucia Ripari ◽  
Joe Premier ◽  
Elisa Belotti ◽  
Hendrik Bluhm ◽  
Christine Breitenmoser-Würsten ◽  
...  
2013 ◽  
Vol 64 (11) ◽  
pp. 1058 ◽  
Author(s):  
Nils Teichert ◽  
Pierre Valade ◽  
Pierre Bosc ◽  
Marine Richarson ◽  
Philippe Gaudin

Freshwater-fish populations of the Indo-pacific region are characterised by a large proportion of amphidromous species. We analysed the spawning-habitat selection of Sicyopterus lagocephalus (Gobiidae: Sicydiinae) within two rivers of the Reunion Island. Reproduction traces are rare events, so a presence-only sampling procedure was performed to collect egg clutches and a random description of available habitat was conducted to generate pseudo-absence data. Logistic models showed a strong selection for microhabitat variables and mesohabitat units. S. lagocephalus selected areas where availability of potential nests was high (small cobble to small boulder) and where interstitial substratum allowed intragravel flow. Our results suggest that the availability of favourable substratum may be a limiting factor, which could result in occupancy of suboptimal areas. Water depth and velocity had less of an effect on the selection of a spawning area. Higher selection for shallow (<60 cm) and lotic (>30 cm s–1) geomorphic units, with an optimum for riffle and cascade, suggested that mesohabitat could be a satisfactory approach to quickly assess the availability of spawning areas within a watercourse for expertise studies.


PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e86181 ◽  
Author(s):  
Chihiro Takahata ◽  
Scott Eric Nielsen ◽  
Akiko Takii ◽  
Shigeyuki Izumiyama

2010 ◽  
Vol 88 (9) ◽  
pp. 875-883 ◽  
Author(s):  
Jodie Martin ◽  
Mathieu Basille ◽  
Bram Van Moorter ◽  
Jonas Kindberg ◽  
Dominique Allainé ◽  
...  

In human-dominated landscapes, species with large spatial requirements, such as large carnivores, have to deal with human infrastructure and activities within their home ranges. This is the case for the brown bear ( Ursus arctos L., 1758) in Scandinavia, which is colonizing more human-dominated landscapes, leading inevitably to an overlap between their home ranges and anthropogenic structures. In this study, we investigated fine-scale habitat selection by brown bears to examine how they deal with this potential disturbance. Using Global Positioning System (GPS) data, we studied (i) habitat selection of female brown bears within their home range and (ii) the influence of diurnal variation in human disturbance on fine-scale habitat use. As expected, females selected habitats within their home range that provided abundant food resources and minimized human-caused disturbance. In addition, our temporal analysis of habitat selection revealed an avoidance of disturbed areas and a selection of slopes by bears during periods of highest human activities, i.e., during daylight hours. We clearly demonstrate the importance of considering the fluctuations in human activity when studying habitat selection, especially at fine spatial scales. Failing to do so may considerably reduce the power to detect important fine-scale habitat-selection behaviors.


Author(s):  
YUAN Bao-dong ◽  
PAN Yang ◽  
YAN Yong-feng

A habitats comprises a range of environmental features that provide adequate resources for wildlife to survive. Consequently, the criteria of habitat selection by animals, combines a wider spectrum of both environmental and other factors, with major prerequisites being food resources, availability of shelter and suitable conditions for reproduction. The den habitat selection of the Chinese bamboo rat (Rhizomys sinensis) was studied in Yuanbaoshan Nature Reserve, Guangxi China. The Vanderloeg and Scavia selectivity index (Ei) indicates that the Chinese bamboo rat shows a preference for all habitat features except for slope, slope position and distance to water (P>0.05). Chi-square goodness of fit test showed that canopy density, shelter from wind, distance between shrubs, shrub density, elevation, southern aspect, human disturbance and food abundance, were the preferred features (P less than 0.05). With regards to human disturbance, the Chinese bamboo rat preferred places >1000 m away from human habitation. An eastern and southern sloping direction, a 20°^~40° slope and an elevation range of >1800m were more frequently used. The Chinese bamboo rat prefers habitats lying above 1000m in elevation with high shrub density (with shrub separation under 0.1m). Principle component analysis indicates that concealment factors, geographical factors, interference factors, food factors, and water factors affect the den habitat character of the Chinese bamboo rat. Our results support the notion that the habitat preferences of the Chinese bamboo rat are a tradeoff between suitable habitat features and avoidance of potential human interactions.


2013 ◽  
Vol 157 ◽  
pp. 324-330 ◽  
Author(s):  
Justin A. Dellinger ◽  
Christine Proctor ◽  
Todd D. Steury ◽  
Marcella J. Kelly ◽  
Michael R. Vaughan

2013 ◽  
Vol 40 (3) ◽  
pp. 217 ◽  
Author(s):  
Wen-Bo Yan ◽  
Zhi-Gao Zeng ◽  
Duo Pan ◽  
Tie-Jun Wang ◽  
Qiong Zhang ◽  
...  

Context Knowledge of the habitat selection of reintroduced species is crucial to successful re-establishment of viable populations and effective conservation decision-making. Aims The aim of our research was to examine habitat selection by reintroduced Eld’s deer (Cervus eldi) in a human-dominated landscape. Methods The study was conducted during the period from July 2005 to November 2007 in the Chihao region, a human-dominated area located in western Hainan Island, China. Radio-telemetry was used to monitor 15 collared deer to gain their location information. Resource selection functions were used to quantify habitat selection of the study population at the landscape and home-range scales in both wet and dry seasons. Key results At the landscape scale, Eld’s deer showed selection for habitats with scrubland, high elevation, gentle slope, close to water sources and roads. At the home-range scale, Eld’s deer showed selection for habitats with dense forest, scrubland, grassland, low elevation and far away from roads, but they randomly used habitats without special consideration to the distance to water sources. At both landscape and home-range scales, Eld’s deer showed strong avoidance of villages. In addition, Eld’s deer showed increased selection of sparse forests and decreased use of grasslands in the dry season, as compared with the wet season at both spatial scales. Sexual differences in habitat selection existed in reintroduced Eld’s deer. Males showed stronger avoidance to human disturbance, whereas females selected vegetation with higher forage availability but poor hiding cover, especially during the antler-growing period (i.e. wet season). Conclusions The habitat selection of reintroduced Eld’s deer was scale-dependent. As a non-fatal anthropogenic factor, human disturbance had a strong influence on habitat selection of Eld’s deer. They more strongly selected slope habitats at relatively high elevations. However, our results also indicated that the reintroduced Eld’s deer had certain adaptive ability and tolerance to the disturbed environment. Implications This work provides insight into the habitat selection of reintroduced Eld’s deer in a human-dominated landscape. If the essential food resources are available, the regions at a relatively high elevation with low human disturbance can be considered as potential sites of future Eld’s deer reintroduction.


2003 ◽  
Vol 9 (1) ◽  
pp. 141-153 ◽  
Author(s):  
Mayumi Sakuragi ◽  
Hiromasa Igota ◽  
Hiroyuki Uno ◽  
Koichi Kaji ◽  
Masami Kaneko ◽  
...  

Paléorient ◽  
1981 ◽  
Vol 7 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Amiel Brosh ◽  
M. Ohel

2020 ◽  
Vol 57 (3) ◽  
pp. 181-189
Author(s):  
Asma Majid ◽  
GA Parray ◽  
NR Sofi ◽  
Gazala H Khan ◽  
Showkat A Waza ◽  
...  

Rice being a staple food crop of Kashmir valley, the focus is on enhancement of yield in order to meet the needs of ever-growing population.Identification of new parental lines is crucial for developing ecology-specific hybrids with ideal agronomic performance. Exploitation of heterosis in the form of hybrid rice technology can be one of the approaches to increase productivity in this crop, especially exploiting diversity among japonica lines can serve as an excellent route.A number of CMS lines suitable formountainous areas of Kashmir have been developed, however, the availability of promising restorer lines remains to be the major limitation for utilization of these lines.Identification of potential restorers acts as the main limiting factor for hybrid development in the Kashmir valley. Marker based screening for Rf3 and Rf4 fertility restorer genes can be helpful in rapid selection of restorer lines while dealing with the large quantity of genetic materials. In the present study, 100 rice germplasm were screened with the help of SSR markers, RM3148 and RM6100linked to Rf3 and Rf4 genes on chromosome 1 and 10, respectively. In total, 19 lines revealed the presence of both Rf3 and Rf4 genes. These lines amplified fertility restorer specific alleles for both the genes and may serve as potential restorers for obtaining heterotic rice hybrids. Further the germplasm lines were also evaluated for yield and quality traits.The present results would help in selection of suitable restorers along with preferred grain shape/size.


Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2454
Author(s):  
Yue Sun ◽  
Yanze Yu ◽  
Jinhao Guo ◽  
Minghai Zhang

Single-scale frameworks are often used to analyze the habitat selections of species. Research on habitat selection can be significantly improved using multi-scale models that enable greater in-depth analyses of the scale dependence between species and specific environmental factors. In this study, the winter habitat selection of red deer in the Gogostaihanwula Nature Reserve, Inner Mongolia, was studied using a multi-scale model. Each selected covariate was included in multi-scale models at their “characteristic scale”, and we used an all subsets approach and model selection framework to assess habitat selection. The results showed that: (1) Univariate logistic regression analysis showed that the response scale of red deer to environmental factors was different among different covariate. The optimal scale of the single covariate was 800–3200 m, slope (SLP), altitude (ELE), and ratio of deciduous broad-leaved forests were 800 m in large scale, except that the farmland ratio was 200 m in fine scale. The optimal scale of road density and grassland ratio is both 1600 m, and the optimal scale of net forest production capacity is 3200 m; (2) distance to forest edges, distance to cement roads, distance to villages, altitude, distance to all road, and slope of the region were the most important factors affecting winter habitat selection. The outcomes of this study indicate that future studies on the effectiveness of habitat selections will benefit from multi-scale models. In addition to increasing interpretive and predictive capabilities, multi-scale habitat selection models enhance our understanding of how species respond to their environments and contribute to the formulation of effective conservation and management strategies for ungulata.


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