Shell morphology, growth pattern and population dynamics of the land snail Xerolenta obvia (Menke, 1828) in two areas of different climatic conditions within a temperate climate region

作者: Magdalena Marzec , Elżbieta Kuźnik-Kowalska , Małgorzata Proćków

DOI: 10.17109/AZH.66.1.69.2020

关键词:

摘要: To determine the relative role of climatic variables (temperature and precipitation) on land snail Xerolenta obvia populations, field surveys were conducted in Poland at two sites (SW NE) with striking differences regime during growing seasons. In a temperate climate Central Europe X. is an annual species majority snails hatching autumn. They overwinter as juveniles, continue their growth spring summer, reproduce following Due to comparatively milder climate, SW population more plastic, some individuals can live longer. The variants model are presented. We found that length season temperature additional factors determining snails’ dynamics between sites. rate negatively correlated initial size shells varies among These geographically distant populations differ terms shell morphology. characterised by larger, dark banded compared NE one, which dominated smaller, white shells. A pattern decreasing body areas shorter may explain obvia. Larger regions warmer drier environment perhaps constitute responses selection environmental factors.

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