Soil Macrofaunal Communities are Heterogeneous in Heathlands with Different Grazing Intensity

来源 :Pedosphere | 被引量 : 0次 | 上传用户:nayitian1046906153
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Moderate grazing by cattle increases the heterogeneity of soil and vegetation. This has been suggested as an ecologically sustainable mean of managing natural environments endangered by tree encroachment, such as heathlands. Our study was performed to test the impact of grazing intensity on soil macroinvertebrate communities in heterogeneous landscapes in a private property eligible to the Natura 2000 European Network of Special Protection Areas within the Brenne Natural Regional Park(Indre, France). We sampled macroinvertebrates along a broken line crossing 5 different land-use types, from pasture to pine forest, passing through a besom heath(Erica scoparia) heathland at 3 levels of cattle pressure. We hypothesized that: i) litter-dwelling(mostly arthropods and mollusks)and soil-dwelling macroinvertebrates(mostly earthworms) would respond in an opposite manner to various grazing intensities, and ii) intermediate cattle pressure(pastured heath) would increase soil and community heterogeneity. The results supported the first hypothesis, which was explained by land-use impacts mediated by soil properties. However, our results supported only partly the second hypothesis since maximum dissimilarity(whether in the composition of soil macroinvertebrate communities or in soil features)was observed in only one out of the two pastured heaths where cattle pressure was intermediate. Moderate grazing by cattle increases the heterogeneity of soil and vegetation. This has been suggested as an ecologically sustainable mean of managing natural environments endangered by tree encroachment, such as heathlands. Our study was performed to test the impact of grazing intensity on soil macro invertebrate communities in heterogeneous landscapes in a private property eligible to the Natura 2000 European Network of Special Protection Areas within the Brenne Natural Regional Park (Indre, France). We sampled macroinvertebrates along a broken line crossing 5 different land-use types, from pasture to pine forest, passing through a besom heath (Erica scoparia) heathland at 3 levels of cattle pressure. We hypothesized that: i) litter-dwelling (mostly arthropods and mollusks) and soil-dwelling macroinvertebrates (mostly earthworms) would respond in an opposite manner to various grazing intensities, and ii) intermediate cattle pressure (pastured heath) would increase soil and community heterog ene results. The results supported the first hypothesis, which was explained by land-use impacts mediated by soil properties. However, our results supported only partly the second hypothesis since soil dissatisfaction (whether in the composition of soil macroinvertebrate communities or in soil features) was observed in only one out of the two pastured heaths where cattle pressure was intermediate.
其他文献
1994年世界原钢产量据国际钢铁协会的初步统计数字,1994年世界原钢产量为72332.3万吨,比前年的73003.4万吨下降了0.9%。中国原钢产量达9153万吨,比1993年的8868万吨增长3.2%,首次超过美国,升至世界第二位。日本原钢产量从...
财务制度规定企业要设立住房基金备查簿,以全面反映企业住房基金的来源和运用,使用于住房方面的资金不超过住房基金总额。笔者以为,住房基金备查簿是对住房资金会计核算资料
根据学院1995年度工作要点中对科技工作的要求,通过全院上下开展过细与深层次的工作以及各部门的共同努力,我院科技项目呈现出“上强度、上水平、上规模”的良好势头.从1月份至
攻击性行为对幼儿的身心健康及同伴的成长都会产生不良的影响。对于孩子的攻击性行为,家长要多管齐下,既要提升幼儿的认知能力,又要采取一些安慰、鼓励、利用媒体向幼儿传播
我们大冶钢厂是中国近代史上最早的冶金企业之一,至今已有百余年历史,是全国大型特殊钢企业。改革开放以来,我们坚持实践第一的观点,重实践,积极建设具有冶钢特色的企业文化,
随着世界各国经济的迅速发展和生产力水平的不断提高,人类对环境的影响越来越大,环境问题已日益突出和尖锐化。严重的生态破坏和环境污染问题已成为当代人类社会面临的重大问
大家好,我是李杰辉,来自广东广州,从事农业项目多年。目前我在广州从化做火龙果种植项目。在我刚接触火龙果种植时,延用老前辈们的种植方式,在植株生长初期没有发现异常,但植
近年来,我国企业对科技进步日益重视,科学技术在发展企业生产经营中发挥着越来越大的“核聚变”效能。然而,作为科学技术重要组成部分的企业科研工作,却相对比较薄弱。不少
《中国蜂业》杂志,1934年1月创刊。中华人民共和国农业部主管,中国农业科学院蜜蜂研究所、中国养蜂学会主办。国家级蜂学专业期刊,中国期刊方阵双效期刊,中国农业核心期刊,中
改革开放以来,在化工部、总公司的正确领导下,我公司坚定不移地贯彻“深化改革,强化管理,苦练内功,提高效益”的方针,坚持以改革促发展,靠管理强素质,使企业的综合实力明显