Patterns in the Potamoplankton of the Saginaw River and Shiawassee National Wildlife Refuge, Michigan

rivers;phytoplankton;shiawassee;saginaw;Natural Resources and Environment

Stack, JamesKowalski, Kurt ;

University of Michigan

关键词: rivers;    phytoplankton;    shiawassee;    saginaw;    Natural Resources and Environment;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/116235/james_stack_thesis_snre_final_2015.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

As part of ongoing research evaluating the baseline conditions of the Shiawassee NationalWildlife Refuge (SNWR), Michigan, prior to a large scale floodplain wetland restoration,this project focused the variation in phytoplankton and water chemistry; spatially,seasonally, and hydrologically. During the growing season of 2014, phytoplankton andwater chemistry parameters were surveyed throughout the SNWR and Saginaw River. Thesesamples were synthesized and data were compared for patterns by season, sample location,and longitudinal position on the Saginaw River. Phytoplankton and water chemistry werealso compared to hydrologic data including river slope (which served as an indicator ofhydraulic residence time) as well as the occurrence of reverse or stalled flow in the SaginawRiver.Results indicated that phytoplankton communities in floodplain wetlands, tributaries,and the main river channel varied significantly by taxonomic composition and abundance, asdid key water chemistry parameters (Total Phosphorus, Nitrate, Total Dissolved Solids).Additionally, potamoplankton communities in the Saginaw River varied longitudinally,becoming more abundant, taxonomically rich, and diverse from upstream to downstream.Prolonged residence times due to low slopes also showed more diverse and abundantpotamoplankton communities with fewer diatoms than times of high slopes. The occurrenceof reverse flow was found to be associated with a homogenizing effect along the course ofthe Saginaw River both in terms of biology and water chemistry.