نتایج جستجو برای: habitat type

تعداد نتایج: 1390672  

Journal: :Ecology 2010
Florian Altermatt Dieter Ebert

Migration is the key process to understand the dynamics and persistence of a metapopulation. Many metapopulation models assume a positive correlation between habitat patch size or stability and the number of emigrants. However, few empirical data exist, and habitat patch size and habitat stability may affect dispersal differently than they affect local persistence. Here, we studied the producti...

This study aimed to identify the most important physical variables affecting the distribution of four range plants species (Tamarix aphylla, Calligonum comosum, Prosopis spicigera and Salsola rigida) habitats and to prepare potential habitat map of the species using Maximum Entropy (MaxEnt) method in rangelands of Jiroft city, Kerman province, located in SE Iran. To this end, sampling of vegeta...

فاخران, سیما, فرهمند, مریم, مرادی, حسین, مکی, تکتم, ایروانی, مجید ,

Development of roads through protected areas and ecological sensitive regions can have catastrophic effects on wildlife. In Iran, road construction in sensitive habitats and protected areas has been expanding during the past decades. This study focuses on the ecological impacts of Isfahan’s west ringway, which passes through Ghamishloo wildlife refuge, I.U.C.N category IV, in Isfahan Province. ...

Journal: :Memorias do Instituto Oswaldo Cruz 2011
Marina Stein Francisco Ludueña-Almeida Juana Alicia Willener Walter Ricardo Almirón

To classify mosquito species based on common features of their habitats, samples were obtained fortnightly between June 2001-October 2003 in the subtropical province of Chaco, Argentina. Data on the type of larval habitat, nature of the habitat (artificial or natural), size, depth, location related to sunlight, distance to the neighbouring houses, type of substrate, organic material, vegetation...

Saeedi, Elmira, Zaighami, Habib,

Diabetes is the most common endocrine disease following the spread of metabolic diseases worldwide. Diabetes is also the fifth leading cause of death in the world. Patients with type 2 diabetes account for about 90% of people with diabetes. Studies over the past years have shown a significant association between intestinal microbiota, intestinal dysbiosis, and metabolic syndrome. Changes in the...

2017
Mary Santelmann Kathryn Freemark Jean Sifneos Denis White

A habitat-change model was used to compare past, present, and future land cover and management practices to assess potential impacts of alternative agricultural practices on wildlife in two agricultural watersheds, Walnut Creek and Buck Creek, in central Iowa, USA. This approach required a habitat map for each scenario based on soil type and land cover, a list of resident species, and an estima...

Journal: :Integrative and comparative biology 2010
Mads S Thomsen Thomas Wernberg Andrew Altieri Fernando Tuya Dana Gulbransen Karen J McGlathery Marianne Holmer Brian R Silliman

The importance of positive interactions is increasingly acknowledged in contemporary ecology. Most research has focused on direct positive effects of one species on another. However, there is recent evidence that indirect positive effects in the form of facilitation cascades can also structure species abundances and biodiversity. Here we conceptualize a specific type of facilitation cascade-the...

2011
Emmanuelle Richard Sonia Said Jean-Luc Hamann Jean-Michel Gaillard

Interactions between animal behaviour and the environment are both shaping observed habitat use. Despite the importance of inter-specific interactions on the habitat use performed by individuals, most previous analyses have focused on case studies of single species. By focusing on two sympatric populations of large herbivores with contrasting body size, we went one step beyond by studying varia...

2007
JEFFREY P. COPELAND

Although understanding habitat relationships remains fundamental to guiding wildlife management, these basic prerequisites remain vague and largely unstudied for the wolverine. Currently, a study of wolverine ecology conducted in Montana, USA, in the 1970s is the sole source of information on habitat requirements of wolverines in the conterminous United States. The Montana study and studies con...

Journal: :Animal behaviour 1998
Daniel Blumstein

Acoustic signals must be transmitted from a signaller to a receiver during which time they become modified. The acoustic adaptation hypothesis suggests that selection should shape the structure of long-distance signals to maximize transmission through different habitats. A specific prediction of the acoustic adaptation hypothesis is that long-distance signals of animals in their native habitat ...

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