Wyniki wyszukiwania

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Nematode communities in subalpine meadows in Central Pyrenees

100%

Dmowska E.

Annales Zoologici

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2000

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tom 50

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nr 2

Studies were carried out in subalpine meadows in the “Massif Néouvielle” in Central Pyrenees (France). Three habitats differing in humidity, temperature and soil pH were selected: 1 - dry and warm acidic soil, 2 - medium dry, acidic soil, 3 - wet and cold, neutral soil. One hundred and forty nematode species belonging to 7 orders, 21 families and 71 genera were found in studied material. Quantitative parameters: total number, numbers of families and genera of nematode communities from analyzed sites were poorly differentiated. However, great differences were found in composition and structure of studied communities. Dry and warm soil was dominated by nematodes of three orders: Areolaimida (27.02%), Dorylaimida (25.48%) and Tylenchida (24.32%), eudominants being genera: Aporcelaimellus, Paratylenchus and Prismatolaimus. In medium dry soil dominated Tylenchida (44.54%), Areolaimida (17.38%), Rhabditida (14.5%) and eudominants were: Acrobeloides, Rhabdolaimus and Rotylenchus. Enoplida (63.01%) dominated in wet and cold soil and eudominant was Rhabdolaimus. Shannon Index of diversity for genera in dry and warm soil was 3.77, in medium dry 4.24, and in wet and cold soil 3.06. Fourteen species were common for all three sites. Low values of Sørensen’s similarity index (below 40%) show a low similarity at a species level between communities from various sites.

2

Trichocera Meigen: characteristics of the mutica group with a new species described [Diptera: Trichoceridae]

100%

Krzeminska E.

Polskie Pismo Entomologiczne

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2000

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tom 69

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nr 4

3

Diet of Sorex coronatus in the western Pyrenees

100%

Castien E., Gosalbez J.

Acta Theriologica

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1995

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tom 40

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nr 2

The diet of Sorex coronatus (Millet, 1828) was studied by the analysis of digestive tracts from 178 individuals collected in Quinto Real Massif, western Pyrenees (north of the Iberian Peninsula). In total, 28 different types of food were determined. The most important prey species, as determined by numerical presence (N) and Simpson's dominance index (D"), were Chilopoda (%N = 12.8; D" = 21.4), Diptera larvae (%N = 22.0; D"= 17.7), Oligochaeta: Opistopora (%N = 11.3; D" = 12.2), Gastropoda (%N = 7.0; D" = 8.7), adult Coleoptera (%N = 6.9; D" = 8.0) and Hemiptera (%N = 6.0; D" = 5.3). Diets of both sexes were similar. The diet of S. coronatus in the study area was similar to the diet of S. araneus described in the literature.

4

Deteriorating weather conditions predict the use of suboptimal stopover sites by Aquatic Warblers Acrocephalus paludicola

84%

Arizaga J., Mendiburu A., Andueza M., Fontanilles P., Fourcade J.-M., Urbina-Tobias P.

Acta Ornithologica

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2011

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tom 46

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nr 2

The Aquatic Warbler Acrocephalus paludicola is a globally threatened songbird and its decline is related to habitat loss. Accordingly, most studies dealing with the stopover ecology of this species have been chiefly focused on the habitat use and the availability of suitable habitats along its route of migration. In contrast, much less attention has been paid to other environmental causes potentially explaining the use of stopover sites. Our aim here was to investigate whether the Aquatic Warbler at an apparently suboptimal stopover site with small area of suitable habitats stops over only during adverse weather conditions. We used data obtained at a suboptimal 0aizubia marshland, northern Iberia) and another optimal (Villefranque, southwestern France) stopover sites during the autumn migration over four seasons (2007-2010). The Aquatic Warbler tended to stop over at Jaizubia in days with rain, a fact that was not so evident at Villefranque, supporting the hypothesis that they used the suboptimal site only, or mostly, when adverse weather conditions forced them to land. In contrast, the optimal habitat was used independently of weather conditions. To properly identify key stopover localities for the Aquatic Warbler, we should consider the potential influence of adverse weather in occurrence of individuals, especially in small areas without preferred habitat.

5

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Loiseleuria procumbens [Ericaceae] in the Spanish Pyrenees

84%

Boratynski A., Romo A.

Acta Societatis Botanicorum Poloniae

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2003

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tom 72

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nr 2

The paper analyses the distribution and occurrence conditions of Loiseleuria procumbens in the Spanish Pyrenees. The species represents a typical arctic-alpine element in the flora of Europe. In the Pyrenees it reaches its southernmost European localities. The Pyrenean populations of the species are not numerous in the majority of the localities. L. procumbens occurs most frequently in the alpine and subalpine zones, at altitudes between 2100 and 2650 m, with a minimum at 1750 m and a maximum at 2900 m. It has been reported nearly exclusively in the siliceous substrata, and predominantly on the north-facing slopes, on the regosols and/or on flat tops of rocks. It forms its own communities, mostly included into the Loiseleurio-Vaccinion alliance, and rarely enters associations of the Festucion airoidis and Rhododendro-Vaccinion alliances. Its typical community, Cetrario-Loiseleurietum procumbentis, is found only in the eastern and central parts of the Spanish Pyrenees.

6

Contribution to the phytocoenological knowledge of Pyrenean forests

84%

Carreras J., Carrillo E., Ninot J. M., Vigo J.

Fragmenta Floristica et Geobotanica

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1997

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tom 42

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nr 1

7

Pyrenaeibufonaria gen.nov. from the Pyrenees [Hemiptera: Membracoidea: Ulopidae]

84%

Szwedo J.

Annales Zoologici

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2001

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tom 51

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nr 3

A description of Pyrenaeibufonaria gen. nov. with the type species Neobufonaria louisaraphaeli della Giustina and Blasco-Zumeta from the Pyrenees is given. Its taxonomic position, morphological characters and affinities with the genus Neobufonaria Koçak, known from the mountains of Central Asia, is discussed.

8

Etage alpin et Toundra de montagne: parente ou convergence?

67%

Ozenda P.

Fragmenta Floristica et Geobotanica. Supplementum

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1993

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tom 02

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nr 2

9

Habitat and food preferences in a guild of insectivorous mammals in the Western Pyrenees

67%

Castien E., Gosalbez J.

Acta Theriologica

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1999

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tom 44

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nr 1

The use of trophic and spatial resources in a guild composed of five species of insectivorous mammals (Galemys pyrenaicus, Talpa europaea, Neomys fodiens, Sorex coronatus, and Sorex minutus) was studied. The characteristics of the macrohabitat were studied based on data from trap lines. Those pertaining to the microhabitat were examined through a study of the sites where each animal was caught. The diet was studied by analysis of the digestive tract as well as the availability of resources in various microhabitats. The results show a high level of segregation in the use of trophic resources. The microhabitat used on the ground surface has a low level of segregation among the shrews. A comparison of the diet of each species with the results from the invertebrate sampling carried out in different microhabitats (water, subsoil, humus, ground surface) shows that there is a relation between the food consumed and its availability in the microhabitats utilised by each species. This study suggests that the coexistence among the insectivorous species studied may be explained by the use of the microhabitat and diet segregation. The differences in diet would be a consequence of the use of different microhabitats. Servicio de Conservacion de la Biodiversidad, Gobierno de Navarra, C.I Alhóndiga 1, 31002 Pamplona, Spain (EC); Departament de Biologia Animal, Facultat de Biologia, Universität de Barcelona, Avgda. Diagonal 645, 08028 Barcelona, Spain (JG)

Ograniczanie wyników

Nematode communities in subalpine meadows in Central Pyrenees

Trichocera Meigen: characteristics of the mutica group with a new species described [Diptera: Trichoceridae]

Diet of Sorex coronatus in the western Pyrenees

Deteriorating weather conditions predict the use of suboptimal stopover sites by Aquatic Warblers Acrocephalus paludicola

Loiseleuria procumbens [Ericaceae] in the Spanish Pyrenees

Contribution to the phytocoenological knowledge of Pyrenean forests

Pyrenaeibufonaria gen.nov. from the Pyrenees [Hemiptera: Membracoidea: Ulopidae]

Etage alpin et Toundra de montagne: parente ou convergence?

Habitat and food preferences in a guild of insectivorous mammals in the Western Pyrenees