Differential response of selected taxa to landscape context and agricultural intensification
Differential response of selected taxa to landscape context and agricultural intensification
复制标题
DOI：
10.1016/s0169-2046(03)00039-2
复制
发表时间：
2004-03-15
影响因子：
9.1
通讯作者：
de la Peña, NM
中科院分区：
文献类型：
--
作者：
Burel, F;Butet, A;de la Peña, NM
了解生物多样性在改变农业景观中的动态是自然保护和农业政策的一个目标。农业在从农田到景观的多个时空层次上运行，并根据其生态特征引起不同的群落响应。几个类群的景观和农业变化的反应进行了沿着景观梯度在北方布列塔尼（法国）收集14个网站。景观范围从细粒度的地区，有很大比例的永久性草地，木材和树篱，以农作物为主的粗粒度的。群落的反应是物种沿着梯度减少（如双翅目摇蚊科和姬小蜂科）、替代（鞘翅目步甲科）和物种组成不变（小型哺乳动物）。在本文中，我们提出了为什么这些类群的反应在这样不同的方式，根据他们的生活史特征，他们的流动模式和景观结构或农业集约化的参数，他们是敏感的。绿篱网的密度和个体绿篱的渗透性决定了双翅目成虫的空间分布，并与其飞行能力有关。步甲的平均身体大小显着降低沿着梯度的农业集约化，小物种适应干扰取代大的特点是稳定的栖息地。相同的小型哺乳动物物种被发现所有沿着这两个梯度，但它们的相对丰度是与作物的重要性，而不是更稳定的栖息地在landscape.We的结论是，物种生存在这些细粒度的农业景观取决于过程中运作的网站规模和定义栖息地质量，以及在景观和/或集合种群尺度上运作的过程，如连通性和栖息地可用性方面的景观改变。(C)2003 Elsevier Science B. V.保留所有权利。
Understanding the dynamics of biodiversity in changing agricultural landscapes is a goal for nature conservation and agricultural policies. Agriculture operates at several spatio-temporal levels from field to landscape, and induces differential response of communities according to their ecological traits. Reactions of several taxa to landscape and agricultural changes was conducted along landscape gradients in northern Brittany (France) gathering 14 sites. Landscapes ranged from fine grained areas, with a large proportion of permanent grasslands, wood and hedgerows, to coarse grained ones dominated by crops. Response of communities were either loss of species along the gradient (as for Diptera Chironomidae and Empididae), replacement (Coleoptera Carabidae) and no change in species composition (small mammals). In this paper, we present why these taxa react in such different ways according to their life history traits, their mobility patterns and to which parameters of landscape structure or agriculture intensification they are sensitive. Density of hedgerow networks, and permeability of individual hedgerows determine the spatial distribution of adults Diptera according to their flying ability. Mean body size of carabid beetles significantly decreases along the gradient of agricultural intensification, small species adapted to disturbance replacing large ones that are characteristic of stable habitats. The same small mammal species are found all along the two gradients, but their relative abundance is linked to the importance of crops versus more stable habitats in the landscape.We concluded that species survival in those fine grained agricultural landscapes depends on processes operating at the site scale and defining habitat quality, and processes operating at the landscape and/or metapopulation scale such as landscape modifications in connectivity and habitat availability. (C) 2003 Elsevier Science B.V. All rights reserved.