Topic
Occupancy
About: Occupancy is a research topic. Over the lifetime, 2757 publications have been published within this topic receiving 68288 citations.
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TL;DR: Simulation of potential management actions showed that substantial increases in the number of territories occupied by the less common species can only be attained if relatively large increases in their reoccupation and colonization rates are considered.
Abstract: A Markovian modeling approach was used to explore territorial interactions among three forest raptors coexisting in a forested natural area in southeast Spain: the booted eagle (Hieraaetus pennatus), the common buzzard (Buteo buteo) and the northern goshawk (Accipiter gentilis). Using field data collected over a period of 12 years, 11 annual transition matrices were built, considering four occupancy states for each territory. The model describes transitional processes (colonization, abandonment, replacement and persistence), permits temporal variations in the transition matrix to be tested, and simulates territorial occupation for a few subsequent years. Parameters for the species and community dynamics were described in terms of turnover times and damping ratio. A perturbation analysis was performed to simulate the effects of changes in the transition probabilities on the stable state distribution. Our results indicate the existence of a stable community, largely dominated by the booted eagles, and described by a time-invariant transition matrix. Despite the stability observed, the territorial system is highly dynamic, with frequent abandonment and colonization events, although interspecific territorial interactions (the replacement of one species by another) are uncommon. Consequently, the three species appear to follow relatively independent occupancy dynamics. Simulation of potential management actions showed that substantial increases in the number of territories occupied by the less common species (goshawk and buzzard) can only be attained if relatively large increases in their reoccupation and colonization rates are considered.
24 citations
TL;DR: In this article, the authors evaluated the effect of habitat cover, fragmentation and anthropogenic pressure on the occupancy probability of leopardus guigna in privately-owned forest fragments.
Abstract: Habitat loss and fragmentation are major drivers of biodiversity loss. A key question, particularly relevant to carnivore conservation, is to which extent species are able to survive in human-modified landscapes. Currently, conservationists are concerned about the impact habitat fragmentation may have on the long-term persistence of the forest-dwelling guina (Leopardus guigna), given the increasingly modified landscapes in which they live. Here we evaluate the effect habitat cover, fragmentation and anthropogenic pressure have on the occupancy probability for guinas in privately-owned forest fragments. We collected camera-trap data from 100 temperate rainforest sites in Chile and used single-season occupancy modeling to evaluate the influence of 13 parameters of landscape structure/anthropogenic pressure and four parameters of detection probability on the ocurrence of guinas. The camera-trap survey data comprised 4168 camera-trap days and 112 independent records of guinas. Surprisingly, fragmented (defined as having a high perimeter-to-area ratio) and moderately sized habitat patches best predicted site occupancy. Occupancy also increased where habitat patches were closer to continuous forest and nearer to buildings. Our results imply that guinas can benefit from a high degree of edge type habitats in fragmented landscapes, capable of adapting to habitat fragmentation in the proximity to large continuous forest patches. This suggests that guinas have a broader niche than previously believed. Additionally, the guina is tolerant of human infrastructure. Further research is required to identify potential ecological traps, long-term source-sink dynamics, and the habitat loss/fragmentation threshold beyond which guina populations are no longer viable.
24 citations
TL;DR: This paper presents a cost-effective approach to occupancy detection utilizing a two-layer detection scheme based on data obtained from multiple non-intrusive sensors (temperature and motion) and demonstrates similar or improved level of the accuracy and F1-score over other works, while using reduced sensor density.
24 citations
TL;DR: In this article, a longitudinal analysis of over 250 farm businesses was conducted to examine the relationships at the farm level, particularly those occupancy changes which may promote landscape alteration, with respect to the management of the farmed landscape.
Abstract: Although there is considerable debate among academic commentators and policymakers about the alleged significance of changes in farm occupancy to the management of the farmed landscape, there is as yet little empirical research detailing the relationships. With use of a longitudinal analysis of over 250 farm businesses, the relationships at the farm level, particularly those occupancy changes which may promote landscape alteration, are examined.
23 citations
TL;DR: In this article, the authors developed and presented an integrated, data-driven modelling framework and results for different space types (like classrooms, studios, computer rooms, office spaces and laboratories and time resolution) for the case study building.
23 citations