نتایج جستجو برای: habitats

تعداد نتایج: 29048  

2017
M. Dorenbosch M. G. G. Grol M. J. A. Christianen I. Nagelkerken G. van der Velde

There is a long-standing debate whether mangrove and seagrass habitats in the IndoPacific region function as nurseries for coral reef fishes. We studied the use of all major shallow-water habitat types by juvenile coral reef fish using visual census surveys at 4 islands along the Tanzanian coast (East Africa) and at the island of Grande Comoros (Comoros archipelago). We investigated the value o...

2004
Silke Bauer Jörg Samietz

Population regulation has been related to differences in the quality among habitats, which mediate differences in vital rates such that in poor habitats reproductive rates are lower than those in high-quality habitats. The spatial distribution of animals in such habitats depends on their preferences and the degree to which individuals have a free choice of a particular habitat. The identified m...

2015
Jan Frouz Pavel Kindlmann Raul Narciso Carvalho Guedes

Continuous colonization and re-colonization is critical for survival of insect species living in temporary habitats. When insect populations in temporary habitats are depleted, some species may escape extinction by surviving in permanent, but less suitable habitats, in which long-term population survival can be maintained only by immigration from other populations. Such situation has been repea...

2014
Heidrun Huber Eric J. W. Visser Gijs Clements Janny L. Peters

Clonal plants, which reproduce by means of stolons and rhizomes, are common in frequently flooded habitats. Resilience to disturbance is an important trait enabling plants to survive in such highly disturbed habitats. Resource storage is thought to enable clonal plants to resume growth after clonal fragmentation caused by disturbance. Here we investigated if submergence prior to disturbance red...

Journal: :American journal of physical anthropology 2009
Richard Wrangham Dorothy Cheney Robert Seyfarth Esteban Sarmiento

Underground storage organs (USOs) have been proposed as critical fallback foods for early hominins in savanna, but there has been little discussion as to which habitats would have been important sources of USOs. USOs consumed by hominins could have included both underwater and underground storage organs, i.e., from both aquatic and terrestrial habitats. Shallow aquatic habitats tend to offer hi...

Journal: :The Journal of experimental biology 2010
Suzanne M Peyer John C Hermanson Carol Eunmi Lee

The invasive zebra mussel (Dreissena polymorpha) has quickly colonized shallow-water habitats in the North American Great Lakes since the 1980s but the quagga mussel (Dreissena bugensis) is becoming dominant in both shallow and deep-water habitats. While quagga mussel shell morphology differs between shallow and deep habitats, functional causes and consequences of such difference are unknown. W...

2015
Magne Sætersdal Ivar Gjerde Einar Heegaard Jan Erik Ørnelund Nilsen Brian J. Palik Eric J. Jokela

Retention forestry, including the retention of woodland key habitats (WKH) at the forest stand scale, has become an essential management practice in boreal forests. Here, we investigate the spatial distribution of 9470 habitat patches, mapped according to the Complementary Habitat Inventory method (CHI habitats), as potential WKHs in 10 sample areas in Norway. We ask whether there are parts of ...

2005
Luisa Mendes Theunis Piersma Miguel Lecoq Bernard Spaans Robert E. Ricklefs

Migratory shorebirds show strong dichotomies in habitat choice during both the breeding and nonbreeding season. Whereas High Arctic breeding species are restricted to coastal marine and saline habitats during the nonbreeding season, more southerly breeding species tend to use freshwater habitats away from coasts. It has been proposed that this co-variation in habitat use is a consequence of a s...

Journal: :Molecular ecology 2007
Cynthia Riginos Clifford W Cunningham

Within the last few million years, repeated invasions from the North Pacific have brought evolutionarily divergent lineages of Macoma balthica clams into contact in the marginal and inland seas of northern Europe (Strelkov et al. 2007). These divergent M. balthica lineages now co-occur and hybridize extensively, blurring the distinction between the lineages and with some populations best descri...

Journal: :Memorias do Instituto Oswaldo Cruz 2002
François Noireau Fernando Abad-Franch Sebastião A S Valente Artur Dias-Lima Catarina M Lopes Vanda Cunha Vera C Valente Francisco S Palomeque Carlos José de Carvalho-Pinto Italo Sherlock Marcelo Aguilar Mario Steindel Edmundo C Grisard José Jurberg

Large-scale trials of a trapping system designed to collect silvatic Triatominae are reported. Live-baited adhesive traps were tested in various ecosystems and different triatomine habitats (arboreal and terrestrial). The trials were always successful, with a rate of positive habitats generally over 20% and reaching 48.4% for palm trees of the Amazon basin. Eleven species of Triatominae belongi...

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