Aquatic connectivity treatments increase fish and macroinvertebrate use of <i>Typha</i>‐invaded Great Lakes coastal wetlands
نویسندگان
چکیده
Coastal wetlands provide critical habitat for aquatic organisms and important ecosystem services the terrestrial landscapes that they bridge, but increasingly common invasive macrophytes disrupt plant communities, food webs, structure littoral–pelagic linkages. In Laurentian Great Lakes coastal wetlands, cattails (Typha × glauca T. angustifolia, hereafter Typha) homogenise reduce nearshore dissolved oxygen, plant, fish macroinvertebrate diversity. We hypothesised management treatments which Typha its abundant litter promote structural heterogeneity mitigate physicochemical biodiversity impacts. To test this hypothesis, we implemented a large-scale (2,048 m2 treatment units), multi-site (four wetlands) experiment in northern Michigan (U.S.A.) to examine how mechanical harvesting (biomass harvest, connectivity channels, Typha-dominated control) altered fish, macroinvertebrate, larval amphibian abundance diversity, water quality 2-year post-treatment. Both harvest channel reduced biomass, cover dominance; increased multi-taxa species richness, diversity abundance; channels community structures. Dissolved oxygen was greater by both treatments, indicating likely mechanisms shifts use. Our results suggest can ameliorate impacts improve quality, adding increase complexity. incorporates appears greatest benefit several taxonomic groups, reducing litter, increasing availability, connection between open wetland interiors. Increasing complexity of invaded provides more realistic goal than complete elimination macrophytes.
منابع مشابه
Considerations for Monitoring Breeding Birds in Great Lakes Coastal Wetlands
One goal in indicator development is to implement long-term monitoring that will track the relative condition of the indicator over time. Among the first steps in establishing a monitoring program is to develop a sampling design that adequately characterizes the indicator to be monitored as well as the cost-effectiveness of the program. We used breeding bird data collected in Lake Superior and ...
متن کاملHuman influences on water quality in Great Lakes coastal wetlands.
A better understanding of relationships between human activities and water chemistry is needed to identify and manage sources of anthropogenic stress in Great Lakes coastal wetlands. The objective of the study described in this article was to characterize relationships between water chemistry and multiple classes of human activity (agriculture, population and development, point source pollution...
متن کاملTesting a Fish Index of Biotic Integrity for Responses to Different Stressors in Great Lakes Coastal Wetlands
Fish community composition often varies across ecoregions and hydrogeomorphic types within ecoregions. We evaluated two indices of biotic integrity (IBIs) developed for fish in Great Lakes coastal wetlands dominated (> 50% cover) by Typha (cattail) and Schoenoplectus (formerly Scirpus) (bulrush) vegetation. Thirty-three coastal wetlands dominated by either Typha or Schoenoplectus vegetation wer...
متن کاملAre Anurans of Great Lakes Coastal Wetlands Reliable Indicators of Ecological Condition?
Frogs and toads (anurans) are sensitive to a variety of anthropogenic stressors and are widely suggested as indicators of ecological condition. We surveyed 220 coastal wetlands along the U.S. shores of the Laurentian Great Lakes and quantified relationships between presence of anuran species and degree of anthropogenic disturbance. Results were used to derive explicit, functional relationships ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Freshwater Biology
سال: 2023
ISSN: ['0046-5070', '1365-2427']
DOI: https://doi.org/10.1111/fwb.14141