نتایج جستجو برای: habitat diversity

تعداد نتایج: 235221  

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2015
A M Souza F N O Fogaça A M Cunico J Higuti

The statement that the habitat complexity and structure govern the abundance and diversity of biological communities has been widely investigated. In this context, we assumed the hypothesis of habitat heterogeneity, that is, the higher habitat complexity leads to greater diversity of Odonata. In addition, we analyzed the influence of habitat structure on the distribution of this community, and ...

2017
Qinggang Wang Xiangyan Su Nawal Shrestha Yunpeng Liu Siyang Wang Xiaoting Xu Zhiheng Wang

Ambient energy, niche conservatism, historical climate stability and habitat heterogeneity hypothesis have been proposed to explain the broad-scale species diversity patterns and species compositions, while their relative importance have been controversial. Here, we assessed the relative contributions of contemporary climate, historical climate changes and habitat heterogeneity in shaping Salix...

Fish sampling was conducted to evaluate the species diversity of fish in 4 stations in Sanandaj Azad dam ecosystem seasonally from summer of 2017 to spring of 2018. A total of 1057 fish were caught in 12 species, of which more than 80% were caught in the lake behind the dam. The Cyprinidae family had 11 species with the most species diversity and only Sasanidus kermanshahensis belonged to the N...

2012
Jacob F. Schaefer Scott R. Clark Melvin L. Warren

Positive correlations between diversity and stability have been reported for a number of ecosystems and are thought to be caused by a stabilizing effect of differential species’ responses to environmental perturbation. Empirical field studies in which investigators tested for diversity–stability relationships are lacking for some taxonomic groups and typically have not included tests of the imp...

2014
Jimena Fraschina Vanina A. León María Busch

The goal of this study was to assess the effect of the different habitats on rodent diversity, and to estimate the effect of changes in land use on the rodent abundance through different possible scenarios. We sampled poultry farms, human houses, riparian habitats, railway embankments, woodlots, pasture, crop fields and their borders. The habitats with highest frequency of captures were poultry...

Ecological studies on road’s impact on wildlife have concentrated on vertebrates although less is known of their effects on invertebrates. The current study presents public road influences on species richness, abundance, and diversity of ground dwelling insects in Arusha National Park in Tanzania. Values from pitfall traps data were generally higher in core habitat than road verge. Nine species...

2017
He Zhao Xuanzhen Li Zhiming Zhang Yong Zhao Jiantao Yang Yiwei Zhu

Arbuscular mycorrhizal fungi (AMF) play an essential role in complex ecosystems. However, the species diversity and composition of AMF communities remain unclear in semi-arid mountains. Further, it is not well understood if the characteristics of AMF community assemblies differ for different habitat types, e.g., agricultural arable land, artificial forest land, natural grassland, and bush/wood ...

2011
CAMILO MORA

Recent advances in analytical methods and exploration of regional diversity patterns in greater depth than simple whole-fauna patterns may change our understanding of the determinants of latitudinal gradients in species richness. Using a comprehensive database on the geographical distributions of the large fauna of endemic shorefishes from the Tropical Eastern Pacific (TEP), we delineated latit...

2016
Katelyn P. Driscoll PATRICK DRISCOLL Maurice Valett Elizabeth Covelli Metcalf Richard Hauer

Floodplains are composed of aquatic and terrestrial habitats that are frequently reshaped by hydrologic processes operating at various spatial and temporal scales. I hypothesized that floodplain habitat complexity is maximized at intermediate discharges because small changes in flow result in substantial aquatic habitat changes and extreme discharges are associated with a decreased habitat hete...

2014
Kezia Kuruvilla

Urbanization and loss of natural habitat has resulted in cities being identified as ecosystems capable of sustaining biotic communities and diversity. This study measured bird species diversity at Vadakkechira pond and surrounding areas during the period 2002-2009. This habitat is situated right in the heart of the city of Thrissur which is renowned for its historic importance and cultural extr...

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