Hydroperiod and its influence on nekton use of the salt marsh: A pulsing ecosystem
Hydroperiod and its influence on nekton use of the salt marsh: A pulsing ecosystem
复制标题
水文周期及其对盐沼游泳生物利用的影响：脉动的生态系统
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
L. Rozas
中科院分区：
文献类型：
--
作者：
L. Rozas
盐沼表面并不是一个均匀的环境。相反，它包含不同的微生境的混合，不同的微生境在海拔、微地形和河口系统中的位置都不同。这些属性与天文潮汐以及气象和气候事件协同作用，导致潮汐泛滥的脉冲。沼泽水期，洪水事件的模式，不仅直接控制Nekton进入沼泽表面栖息地，而且可能通过影响其他因素，如猎物丰度或植被茎密度，调节栖息地开发。在东南大西洋沿岸和墨西哥湾北部海岸，影响沼泽水文周期的因素的相对重要性不同。天文潮汐强迫是大西洋沿岸沼泽水文周期的主要决定因素，而在墨西哥湾沿岸沼泽，可预测的潮汐往往被气象事件所取代。此外，影响沿海水位的其他因素对墨西哥湾沿岸的影响也相应更大。墨西哥湾沿岸沼泽泛滥的时间相对不可预测，似乎并没有限制栖息地的利用。据报道，来自盐沼的一些最高密度的Nekton来自墨西哥湾沿岸沼泽，这些沼泽正在经历相对海平面加速上升导致的逐渐淹没和碎裂。需要对栖息地利用情况进行更多的研究，特别是在太平洋和大西洋海岸。调查应包括使用相同的定量抽样方法对类似的微生境进行区域比较。还需要进行受控野外实验，以阐明影响盐沼栖息地功能的机制。
The salt marsh surface is not a homogeneous environment. Rather, it contains a mix of different microhabitats, which vary in elevation, microtopography, and location within the estuarine system. These attributes act in concert with astronomical tides and meteorological and climatological events and result in pulses of tidal flooding. Marsh hydroperiod, the pattern of flooding events, not only controls nekton access to marsh surface habitats directly but may also mediate habitat exploitation through its influence on other factors, such as prey abundance or vegetation stem density. The relative importance of factors affecting marsh hydroperiod differ between the southeast Atlantic and northern Gulf of Mexico coasts. Astronomical tidal forcing is the primary determinant of hydroperiod in Atlantic Coast marshes, whereas predictable tides are often overridden by meteorological events in Gulf Coast marshes. In addition, other factors influencing coastal water levels have a proportionately greater effect on the Gulf Coast. The relatively unpredictable timing of marsh flooding along the Gulf Coast does not seem to limit habitat utilization. Some of the highest densities of nekton reported from salt marshes are from Gulf Coast marshes that are undergoing gradual submergence and fragmentation caused by an accelerated rise in relative sea level. Additional studies of habitat utilization are needed, especially on the Pacific and Atlantic coasts. Investigations should include regional comparisons of similar microhabitats using identical quantitative sampling methods. Controlled field experiments are also needed to elucidate the mechanisms that affect the habitat function of salt marshes.