Interim Responses of Littoral River Channel Vegetation to Reestablished Flow after Phase I of the Kissimmee River Restoration Project
Interim Responses of Littoral River Channel Vegetation to Reestablished Flow after Phase I of the Kissimmee River Restoration Project
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DOI：
10.1111/rec.12068
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发表时间：
2014-05-01
影响因子：
3.2
通讯作者：
Colee, James
中科院分区：
文献类型：
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作者：
Bousquin, Stephen G.;Colee, James
1998 年至 2008 年，在基西米河河道中对沿岸植被进行了测量，并对相关植物群落进行了物种层面的调查，这一时期跨越了渠道化、不流动的条件，一直到近乎连续重建水流的 7 年。 1971 年，该河被防洪运河 C-38 切断后，实际上一直没有流量，直到 2001 年初，基西米河恢复项目 (KRRP) 第一阶段恢复了流向河道中心部分的流量。本研究评估了重建水流对河道沿岸植被的影响，作为系统状态和生态完整性项目目标进展的指标。植被对重建水流响应的预测包括植被宽度的减少，以及滨海林分生长形式组成的变化，从漂浮物种和挺水物种几乎平等的优势转变为新兴生长形式的压倒性优势。变量包括按物种和生长形式划分的植物覆盖率、植被宽度以及河道植被百分比。在 KRRP 目前不完整（临时）状态下，沿海植被的结果表明了预测变化方向的趋势，并且四分之三的预测变化已经发生。植被宽度大幅减少，滨海植物群落主要以新兴物种为主； BACIPS（控制前后影响配对系列）分析表明，大多数沿海林分指标具有显着的恢复效果。
Measurements of littoral vegetation stands and species-level surveys of associated plant communities were made in channels of the Kissimmee River from 1998 through 2008, a period that spanned channelized, non-flowing conditions through 7 years of near-continuous reestablished flow. Dissected by flood control canal C-38 in 1971, the river was virtually without flow until early 2001, when Phase I of the Kissimmee River Restoration Project (KRRP) reestablished flow to a central section of river channel. This study evaluated the effects of reestablished flow on littoral vegetation in river channels as an indicator of system status and progress toward the project goal of ecological integrity. Predictions of vegetation response to reestablished flow included reduction in the width of vegetation stands, and changes in the growth-form composition of littoral stands from near-equal dominance by floating and emergent species to overwhelming dominance by emergent growth forms. Variables included plant cover by species and growth-form, width of vegetation stands, and vegetated percentage of channel. Under the currently incomplete (interim) status of the KRRP, results for littoral vegetation stands indicate trends in the predicted directions of change, and three of four predicted changes have occurred. Vegetation stand widths decreased substantially and littoral plant communities became heavily dominated by emergent species; BACIPS (before-after-control-impact-paired series) analyses indicated significant restoration effects for most littoral stand metrics.