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首页> 外文期刊>The Canadian Field-Naturalist >Reduced Diversity and Relative Abundance of Terrestrial Snails in a Red Pine Plantation Compared with a Surrounding Northern Red Oak - Large-toothed Aspen Woods
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Reduced Diversity and Relative Abundance of Terrestrial Snails in a Red Pine Plantation Compared with a Surrounding Northern Red Oak - Large-toothed Aspen Woods

机译:与红松种植园中的陆地蜗牛的多样性和相对丰度降低,与周围的北红橡木 - 大齿灰白树林

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摘要

A Red Pine (Pinus resinosa Aiton) plantation and adjacent Northern Red Oak (Quercus rubra L.) - Large-toothed Aspen (Populus grandidentata Michx.) woods, both of which developed from a savannah scrub beginning approximately 60 years ago, were compared with regard to terrestrial snail diversity and abundance. The comparison involved a 30-minute search of ten 1 -m2 quadrats at ten sites in each habitat. In the Northern Red Oak - Large-toothed Aspen woodland, 13 species and 661 individuals were recorded, whereas, in the Red Pine plantation, six species and 24 individuals were recorded. In the Northern Red Oak -Large-toothed Aspen woodland, the most characteristic and abundant species was Novisuccinea ovalis (Say, 1817), which was present in 74 of the 100 quadrats and was represented by 460 individuals. In the pine plantation, the most common species was Zonitoides arboreus (Say, 1816), which was present in 16 quadrats and was represented by 17 individuals. This species was the second most common in the Northern Red Oak - Large-toothed Aspen woodland where 70 individuals were found in 34 quadrats. In both habitats, Z. arboreus was associated with downed wood. Other species occurring in more than 15% of quadrats in the Northern Red Oak - Large-toothed Aspen woodland were Strobilops labyrinthicus (Say, 1817), Glyphyalinia indentata (Say, 1823), and Euchemotrema fraternum (Say, 1824). Although a lower number and diversity of terrestrial snails in the conifer plantation was expected, the contrast was greater than anticipated. The estimated abundance of 46 000 N. ovalis per hectare suggests the potential importance of these medium-sized snails in the relatively dry Northern Red Oak - Large-toothed Aspen ecosystem.
机译:红松(松树树脂)种植园和邻近的北红栎(Quercus Rubra L.) - 大齿羚(Populus Grandidentata Michx。)伍兹,两者都从大草原磨砂发达于大约60年前的比较关于陆地蜗牛多样性和丰富。比较涉及在每个栖息地的十个站点上进行30分钟的10个1厘米四轮车。在北部红橡木 - 大齿羚林林地,13种和661个个体被记录,而在红松种植园中,记录了六种物种和24个个体。在北部红橡木 - 齿状的阿斯彭林地中,最具特色和丰富的物种是Novisuccinea ovalis(例如,1817),其存在于100个四分之一的74中,由460个个体代表。在松树种植园中,最常见的物种是Zonitoides arboreus(比如,1816),其存在于16个四曲面,由17个个体表示。这种物种是北红橡木中最常见的常见型紫杉片林地,其中70个单独的人发现了34个四章。在栖息地,Z.Barroreus与倒下的木头相关联。在北部红橡木北部的超过15%的其他物种中发生 - 大齿亚·阿斯彭林地是Strobilops Labylinthicus(比赛,1817年),血鼠茚(比赛,1823)和Euchemotrema Fradernum(例如,1824)。虽然预期针叶树种植园中的陆地蜗牛的数量和多样性,但对比度大于预期。每公顷46 000张卵巢的估计丰度表明,这些中型蜗牛在相对干燥的北方红橡木 - 大齿氨虫生态系统中的潜在重要性。

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