The effects of water flow and sedimentation on interactions between massive Porites and algal turf
The effects of water flow and sedimentation on interactions between massive Porites and algal turf
复制标题
水流和沉积对块状滨珊瑚与藻皮相互作用的影响
DOI：
10.1007/s00338-014-1154-1
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发表时间：
2014
期刊：
影响因子：
3.5
通讯作者：
R. Carpenter
中科院分区：
文献类型：
--
作者：
Jennifer C. Gowan;Jesse S. Tootell;R. Carpenter
石珊瑚和底栖藻类之间的相互作用可能是构建珊瑚礁群落的一个重要过程，但相互作用的动态并不固定，可能受到沉积等非生物因素的影响，沉积是珊瑚礁退化的一个过程。然而，沉积速率和截留沉积物的影响可能会受到水流的影响。本研究的第一个目标是量化梯度沉积和流沿着边缘和回礁的莫雷阿，法属波利尼西亚的北岸，并确定这种梯度是否与变化的频率和结果的大规模微孔藻草皮相互作用。在后礁上，孔壁藻坪相互作用的频率和藻坪的竞争成功率显着增加，减少流量。然而，沉降并不是所观察到的模式的重要驱动因素。沿着边缘礁，在没有流量梯度的情况下，这是沉积的梯度，最好地解释了孔隙藻坪相互作用频率和竞争力的成功藻坪的空间变化。第二个目标是在实验室环境中量化流动和沉积对微孔藻草皮相互作用的单独和综合影响。低流量和沉积的综合影响显着增加了与藻坪接触时，滨珊瑚组织受损的面积，而高流量衰减的沉积的负面影响。总之，这些结果暗示流动和沉积作为大规模滨珊瑚和藻草皮之间的生物相互作用的重要驱动力。
Interactions between scleractinian corals and benthic algae can be an important process structuring reef communities, yet interaction dynamics are not fixed and may be influenced by abiotic factors such as sedimentation, a process often underlying reef degradation. However, rates of sedimentation and the effects of trapped sediments may be influenced by water flow. The first goal of this study was to quantify gradients in sedimentation and flow along fringing and back reefs of the north shore of Moorea, French Polynesia, and determine whether such gradients correlate with changes in the frequency and outcomes of massive Porites–algal turf interactions. On the back reef, the frequency of Porites–algal turf interactions and the competitive success of algal turfs increased significantly with decreasing flow. Sedimentation, however, was not a significant driver of the observed patterns. Along fringing reefs, in the absence of a flow gradient, it was the gradient in sedimentation that best explained spatial variation in Porites–algal turf interaction frequencies and the competitive success of algal turfs. The second goal was to quantify the separate and combined effects of flow and sedimentation on Porites–algal turf interactions in a laboratory setting. The combined effects of low flow and sedimentation significantly increased the area of Porites tissue damaged when in contact with algal turf, while high flow attenuated the negative effects of sedimentation. Together, these results implicate flow and sedimentation as important drivers of biological interactions between massive Porites and algal turf.