The influence of riparian corridor width on ant and plant assemblages in northern Sydney, Australia
The influence of riparian corridor width on ant and plant assemblages in northern Sydney, Australia
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澳大利亚悉尼北部河岸廊道宽度对蚂蚁和植物组合的影响
DOI：
10.1007/s11252-010-0141-8
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发表时间：
2011
期刊：
影响因子：
2.9
通讯作者：
M. Taylor
中科院分区：
文献类型：
--
作者：
C. Ives;G. Hose;David A. Nipperess;M. Taylor
保护河岸廊道是城市景观中常用的环境政策。然而，证明它们对生物多样性保护结果的有效性的经验数据很少。在这项研究中，我们调查了河岸走廊宽度是否影响蚂蚁(膜翅目：蚁科)的多样性和群落结构以及其中的维管植物组合。18条不同宽度的走廊是从澳大利亚悉尼库林盖地方政府区域内挑选出来的。采用放置在矩形植被样带(30 × 10 m)内的陷阱对蚂蚁进行采样。蚂蚁和植物物种丰富度，当抽样工作标准化时，都与河岸走廊宽度无关。然而，不同地点之间的组成差异明显，宽度增加到~50米。狭窄的走廊包含更多的机会性物种和更高比例的外来植物。我们认为这是来自邻近高地城市环境的更大干扰/边缘影响的结果。样地β多样性并没有随着廊道宽度的增加而增加，这表明在狭窄的河岸廊道中排除新的上坡生境并不是改变这些样地群落组合的重要原因。为了最大限度地减少有害边缘效应对蚂蚁动物群的影响，环境管理者应该设法保留宽于~50米的河岸走廊。然而，我们观察到生物组合在不同地点之间的显著变化，而不考虑走廊宽度。因此，我们建议环境管理实践需要采取流域范围的办法，并考虑可能有助于河岸健康的其他参数，以便最大限度地保护河岸生物多样性。
Protecting riparian corridors is a commonly applied environmental policy in urban landscapes. However, empirical data demonstrating their efficacy for biodiversity conservation outcomes is scarce. In this study we investigated whether riparian corridor width influences the diversity and community structure of ant (Hymenoptera: Formicidae) and vascular plant assemblages therein. Eighteen corridors of differing widths were selected from within the Ku-ring-gai Local Government Area, Sydney Australia. Ants were sampled using pitfall traps positioned within rectangular vegetation transects (30 × 10 m). Both ant and plant species richness, when standardised for sampling effort, were unrelated to riparian corridor width. However, significant compositional differences between sites were evident with increased width up to ~50 m. Narrow corridors contained greater abundances of opportunistic ant species and higher proportions of exotic plants. We interpret this to be the result of the greater disturbance/edge influence derived from adjacent upland urban environments. Site beta diversity did not increase with corridor width, suggesting that the exclusion of novel upslope habitats in narrow riparian corridors is not a significant cause of community assemblage modification at these sites. To minimise the impact of deleterious edge effects on ant fauna, environmental managers should seek to retain riparian corridors wider than ~50 m. However, we observed substantial between-site variability of biotic assemblages, irrespective of corridor width. Therefore we recommend that environmental management practice needs to take a catchment-wide approach and consider other parameters that may contribute to riparian health so as to optimise the protection of riparian biodiversity.
DOI：
10.1111/j.1442-9993.1993.tb00438.x
发表时间：
1993-03-01
期刊：
AUSTRALIAN JOURNAL OF ECOLOGY
影响因子：
--
作者：
CLARKE, KR
通讯作者：
CLARKE, KR