红树林是鱼类的栖息地

影响的情景在泛滥平原干旱补贴被河红树林鱼类(扩展摘要)

罗斯·e·Boucek和詹妮弗Rehage

doi:https://doi.org/10.47886/9781934874424.ch10

生态系统连接是至关重要的供应mangrove-dependent鱼类(Mumby 2006)。红树林河流,食鱼的鱼类种群通常由季节性补贴,高度丰富的猎物,通量从相邻的泛滥平原河流的栖息地在干燥季节的开始。这些泛滥平原的猎物补贴可能的大小依赖于(1)降雨动力学和在前汛期洪水的泛滥平原模式(即。,the growing season for the forage species), and (2) the population dynamics of floodplain predators that may regulate forage fish population dynamics within the floodplain habitat (Welcomme and Halls 2004). Extreme and episodic droughts can disrupt these seasonal prey subsidies by reducing the duration of the flood season, resulting in changes to the population dynamics of floodplain forage fish, as well as affecting floodplain predators. Thus, in dry seasons following these disturbances, the quantity and composition of these subsidies may change as floodplain communities recover from disturbance. However, the long-term effects of droughts on tropical river fish floodplain subsidies remains understudied.

在沿海红树林河流的亚热带湿地(美国),季节性降雨模式决定泛滥平原的猎物补贴沿海红树林河捕鱼国,常见的斯努克Centropomus undecimalis(Boucek和Rehage 2013)。2011年,南佛罗里达once-in-10-years干旱影响。干旱造成泛滥平原为100 d保持干燥,干燥天每年的平均数量的三倍。这干旱在泛滥平原鱼类深远的影响和可能改变补贴常见斯努克(Boucek和Rehage 2014)。本研究的目的是确定和遗留的影响2011年的干旱在泛滥平原补贴。我们假设1年干旱后,由于减少汛期期间,泛滥平原补贴会减少。干旱两年后,由于泛滥平原的复苏较慢食鱼的饲料鱼和自上而下的释放泛滥平原,我们预计临时增加补贴的大小共同斯努克。