Seeds in farmland food-webs: Resource importance, distribution and the impacts of farm management
Seeds in farmland food-webs: Resource importance, distribution and the impacts of farm management
复制标题
农田食物网中的种子：资源重要性、分布和农场管理的影响
DOI：
10.1016/j.biocon.2011.08.013
复制
发表时间：
2011
影响因子：
5.9
通讯作者：
Evans D
中科院分区：
文献类型：
--
作者：
Evans D
Whilst considerable research effort in Europe has linked agricultural intensification with dramatic declines of seed-feeding birds, surprisingly little is known about the wider importance of seeds in animal food-webs. Moreover, understanding the dynamics of farmland seed food resources for species of conservation concern is of considerable research interest. We examined the distribution of berries and soil-surface seeds in the managed and unmanaged habitats of a 125ha organic farm. We took soil suction-samples over a year, counted and identified all seeds, and compared abundances and species-richness between habitats. We constructed ecological networks from literature records and by rearing insects to investigate the importance of these seeds for insects, birds and mammals. We predicted the impacts of management on seed biomass, energy and the ecosystem service of pest control across the whole farm. We estimated seed and berry food resources of up to 33metric tons of biomass and 560GJ of energy on the farm. Potentially, more than 330 species use the seeds as a food resource, the overwhelming majority of which are invertebrates (82%) relying predominantly on non-crop and weed species. Generally, uncultivated semi-natural habitats such as woodland and mature hedgerows were more species-rich and had higher seed biomass and energy than crop habitats throughout the year, but fallow land was disproportionately important for seeds during the summer. Models of increased management intensity revealed declines of up to 19% in seed biomass and energy and cascades through the network that resulted in a substantial decrease in potentially pest-controlling parasitoids.
登录
查看更多内容
Pterandrophysalis levantina（膜翅目：赤眼蜂科）：英国和法国的新属和新种。
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
A. Polaszek;C. McIvor;J. Brooks
通讯作者：
J. Brooks
农场管理对物种特定叶面积指数 (LAI) 的影响：农场规模数据和预测模型
DOI：
10.1016/j.agee.2009.10.006
发表时间：
2010
期刊：
Agriculture, Ecosystems & Environment
影响因子：
--
作者：
Pocock M
通讯作者：
Pocock M
一种估计潮湿土壤植物种子丰度的新装置
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
E. Penny;R. Kaminski;K. Reinecke
通讯作者：
K. Reinecke
两种热带草食性海龟在种子传播中发挥作用的证据1
DOI：
--
发表时间：
1995
期刊：
影响因子：
--
作者：
D. Moll;K. Jansen
通讯作者：
K. Jansen
真空装置估算低地农场土壤表面种子丰度的效率
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
D. Evans;Jj McLeod;L. Pascoe;J. Memmott
通讯作者：
J. Memmott