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排序方式: 共有104条查询结果,搜索用时 890 毫秒
101.
Elżbieta Ziółkowska Katarzyna Ostapowicz Tobias Kuemmerle Kajetan Perzanowski Volker C. Radeloff Jacek Kozak 《Biological conservation》2012,146(1):188-196
Habitat connectivity is important for the survival of species that occupy habitat patches too small to sustain an isolated population. A prominent example of such a species is the European bison (Bison bonasus), occurring only in small, isolated herds, and whose survival will depend on establishing larger, well-connected populations. Our goal here was to assess habitat connectivity of European bison in the Carpathians. We used an existing bison habitat suitability map and data on dispersal barriers to derive cost surfaces, representing the ability of bison to move across the landscape, and to delineate potential connections (as least-cost paths) between currently occupied and potential habitat patches. Graph theory tools were then employed to evaluate the connectivity of all potential habitat patches and their relative importance in the network. Our analysis showed that existing bison herds in Ukraine are isolated. However, we identified several groups of well-connected habitat patches in the Carpathians which could host a large population of European bison. Our analysis also located important dispersal corridors connecting existing herds, and several promising locations for future reintroductions (especially in the Eastern Carpathians) that should have a high priority for conservation efforts. In general, our approach indicates the most important elements within a landscape mosaic for providing and maintaining the overall connectivity of different habitat networks and thus offers a robust and powerful tool for conservation planning. 相似文献
102.
Kormanek Mariusz Małek Stanisław Banach Jacek Durło Grzegorz Jagiełło-Leńczuk Krystyna Dudek Katarzyna 《New Forests》2021,52(2):271-283
New Forests - Cultivation of seedlings in trays requires the use of specifically developed substrates. This study presents the results of the analyses of selected physical and mechanical parameters... 相似文献
103.
Janke C Rogowski K Wloga D Regnard C Kajava AV Strub JM Temurak N van Dijk J Boucher D van Dorsselaer A Suryavanshi S Gaertig J Eddé B 《Science (New York, N.Y.)》2005,308(5729):1758-1762
Polyglutamylation of tubulin has been implicated in several functions of microtubules, but the identification of the responsible enzyme(s) has been challenging. We found that the neuronal tubulin polyglutamylase is a protein complex containing a tubulin tyrosine ligase-like (TTLL) protein, TTLL1. TTLL1 is a member of a large family of proteins with a TTL homology domain, whose members could catalyze ligations of diverse amino acids to tubulins or other substrates. In the model protist Tetrahymena thermophila, two conserved types of polyglutamylases were characterized that differ in substrate preference and subcellular localization. 相似文献
104.
Marek Wełnicki Jacek L. Skrzeczkowski Włodzimierz Zagorski Stanisława Skrzeczkowska Anna Kowalska-Noordam Mirosława Was Waldemar Marczewski 《Potato Research》1990,33(4):497-503
Summary To assess the reliability of dot-spot hybridization assay for the Potato Spindle Tuber Viroid, more than 1000 potato samples
were cross-tested by biological and hybridization methods. Both methods gave similar results with a range of cultivars. The
dot-spot hybridization test was reproducible with formaldehyde-denaturated cell-sap samples stored at room temperature for
over 6 months. This finding means that samples can be transported from field stations to a diagnostic laboratory and allows
for cross-checking of results between laboratories. The data suggest that dot-spot hybridization is suitable for breeding
and quarantine purposes. 相似文献