Data for: Aquatic connectivity treatments increase fish and macroinvertebrate use of Typha invaded Great Lakes coastal wetlands

Coastal wetlands provide critical habitat for aquatic organisms and important ecosystem services for the terrestrial and aquatic landscapes they bridge, but increasingly common invasive macrophytes disrupt plant communities, food webs, habitat structure and littoral-pelagic linkages. In Laurentian Great Lakes coastal wetlands, invasive cattails (Typha ×glauca and T. angustifolia, hereafter Typha) homogenize ecosystem structure and reduce nearshore dissolved oxygen, and plant, fish, and macroinvertebrate diversity. We hypothesize that management treatments that reduce Typha and its abundant litter promote structural heterogeneity and mitigate physiochemical and biodiversity impacts.
To test this hypothesis, we implemented a large-scale (2048 m2 treatment units), multi-site (four coastal wetlands) experiment in northern Michigan (USA) to examine how invasive Typha mechanical harvesting treatments (biomass harvest, aquatic connectivity channels, Typha-dominated control) altered fish, macro..., Study sites
We selected four Great Lakes coastal wetland complexes in northern Michigan (USA) for our study, one in the northern Lower Peninsula and three in the eastern Upper Peninsula. Two of the wetlands (Cheboygan Marsh and St. Ignace Marsh) are in the Straits of Mackinac, near the confluence of Lakes Michigan and Huron, and two (Munuscong Marsh and Sand Island Marsh) are in the St. Marys River, the connecting channel between Lakes Superior and Huron (Figure 1). All wetlands shared similar connectivity to the open lake, but hydrogeomorphic type varied among the wetlands; Cheboygan Marsh and St. Ignace Marsh are lacustrine open embayment types, Munuscong Marsh is a connecting channel river delta, and Sand Island is a connecting channel protected embayment (Albert et al., 2005).
Study design
We conducted our study within invasive Typha-dominated portions of the four wetland complexes. Due to the abundance of advanced generation hybrids in upper Midwest Typha populations and the high f..., Data is saved in Excel file (.xlsx) format and can be opened with Microsoft Excel or Google Sheets. , # Aquatic connectivity treatments increase fish and macroinvertebrate use of Typha invaded Great Lakes coastal wetlands: Data

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We conducted a large-scale study investigating the effects of invasive cattail (Typha spp.) mechanical treatments (harvest, channel, control) on biodiversity in four Great Lakes coastal wetlands. The dataset contains water quality, plant, fish, macroinvertebrate, and amphibian taxonomic data from the two years following treatment implementation. We found that harvest and channel treatments decreased Typha dominance, and channel treatments were more effective; harvest treatments increased total biodiversity; and channel treatments shifted the community composition toward aquatic species.

## Description of the Data and file structure
The data are structured in five spreadsheets (Total, Plants, Fish, Invertebrates, and Amphibians) as individual tabs in the excel file. The Total spreadsheet contains all environmental data and all taxonomic data from the full ...