Periphyton Accumulation Rates from Shark River Slough, Taylor Slough and Florida Bay, Everglades National Park (FCE LTER), South Florida, USA, January 2001 - ongoing

Periphyton accumulation rates were measured quarterly at FCE LTER sites in SRS and TS/Ph marshes (SRS 1-3, TS/Ph 1-3) and the seagrass meadows of Florida Bay (TS/Ph 9-11). Glass slides were used as artificial substrates for periphyton growth. Twenty slides were incubated for 2 months in triplicate periphytometers (flow-through plastic boxes) at the surface (marsh sites) and bottom (seagrass sites) at each site. In addition, at seagrass sites, twelve artificial seagrass blades were incubated for two months in triplicate at each site. Blades were made from strips of transparency film anchored to the bottom and floating upward toward the surface by use of a styrofoam bead on the top of the blade. Data are presented in terms of grams dry and ash-free dry mass accumulated per area per time, as well as the chlorophyll a content of the dry mass and its rate of accumulation. Total phosphorus content of accumulated periphyton is also provided. This is part of continuous data collection to test the hypothesis that phosphorus availability and hydroperiod influence periphyton production in the Everglades.

本研究在美国萨凡纳河试验场（SRS）与TS/Ph湿地的FCE长期生态研究（FCE LTER）站点（含SRS 1-3、TS/Ph 1-3号样地），以及佛罗里达湾海草床（TS/Ph 9-11号样地）开展，每季度测定周丛生物（periphyton）的积累速率。以载玻片作为周丛生物生长的人工定植基质，每个站点设置三组重复的周丛生物培养器（periphytometers，流通式塑料盒）：湿地样地将培养器布设于水面处，海草样地则布设于水底，每组培养器中放置20片载玻片，培养时长为2个月。此外，在海草样地的每个站点中，额外设置三组重复实验，每组放置12片人工海草叶片，培养时长同样为2个月；人工海草叶片由透明胶片条制作，通过叶片顶端的聚苯乙烯泡沫珠将其固定于水底，并使其向上漂浮至近水面位置。实验数据以单位面积单位时间内积累的干重、无灰干重进行表征，同时提供干样的叶绿素a（chlorophyll a）含量及其积累速率，此外还包含周丛生物积累物的总磷（total phosphorus）含量。本数据集属于长期连续监测数据的一部分，旨在验证“磷有效性与水文周期会影响大沼泽地周丛生物生产力”这一研究假说。