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7 results for “dam removal”
The longer arc of channel recovery post-dam removal
<p>This repository includes all data and analyses referenced in the paper "The Longer Arc of Channel Recovery Post-Dam Removal" by Fields et al. (submitted 2024). The R files used to plot figures and complete additional data analysis are also included. </p> <p>This project is a follow-up to earlier work at the same site by Fields et al. (2021) "A Mechanistic Understanding of Channel Evolution following Dam Removal" (10.1016/j.geomorph.2021.107971). Data for that paper is available on the CUAHSI database (http://www.hydroshare.org/resource/ ae0589f6a2e54effb5514d126ecb6908). </p> <p>If any neccessary data is missing or if you require more of our data for your analsyses please contact Jordan Fields (jordan.f.fields@gmail.com). </p>
Maple River Dam Removal Stream Ecology Data
Over the past two decades, dam removal has become an increasingly important aspect of aquatic ecology. The motivation for the removal broadly ranges from purely ecological terms, restoring stream or river connectivity, through safety concerns, as a result of crumbling infrastructure, to economic concerns, increasing local tourism, recreational fishing, or canoeing and kayaking. As a result of this work, ecological studies have arisen that monitor the changes to the riverine ecosystem as a result of removal. Unfortunately, given the uncertain nature of funding and public concerns over dam removal, long term longitudinal studies that cover multiple trophic levels are difficult to find. Fortunately, the University of Michigan Biological Station has been involved in the ecological monitoring of a headwater river (the Maple River) in the northern part of the lower peninsula of Michigan. Through the tremendous intellectual resources available at the station, the physical, chemical, and some biological aspects of this river’s ecology has been measured for eight years prior to the dam removal, during the dam removal, and for two years post-dam removal. The results presented here show that the ecology of the river recovered within this two-year period, but had a different ecological state driven. This new state is primarily driven increases in flow, ammonia, silica, and increases in the populations of the macroinvertebrate feeding guilds of filterers and scrapers. In addition, decreases in stream pH and water temperature contributed to this new state. The results and observations presented here may provide some guidance for other long term monitoring studies.
Size-dependent effects of dams on river ecosystems and implications for dam removal outcomes
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Supporting tables and figures for Cancel Villamil JJ, Locke SA (2022) - Fish assemblage response to removal of a low‐head dam in the lower reach of a tropical island river, Freshwater Biology
<p>Table S1 summarizes studies of the effects of dams on freshwater fish assemblages</p> <p>Table S2 provides results of fishing in 39 samples in three rivers in Puerto Rico in 2017-2019. See 2, below. </p> <p>Figure S1 shows the relationship between fish species richness and time spent electrofishing in these samples.</p> <p>Abstract of article:</p> <p>1. Dams are often removed from rivers to restore habitat connectivity for biota such as fish. Removal of inland dams is well studied in temperate mainland rivers but this approach has been little studied in fish assemblages in islands, tropic systems, or for dams near the mouth of the river. In Puerto Rico, one of the most intensively dammed territories in the world, all native river fishes migrate between fresh water and the sea, and previous work shows these movements are impeded or blocked by dams.</p> <p>2. Fish assemblages were compared before and after removal of the Cambalache dam, a porous, low-head structure near the mouth of the Río Grande de Arecibo, as well as in two other rivers in Western Puerto Rico, one with a similarly sized and positioned dam, and one reference river without artificial barriers. Fish were sampled using backpack electrofishing on 39 occasions during 2017-2019, including seven samples collected after removal of the Cambalache dam, at between four and six sites per river.</p> <p>3. Fish assemblages upstream from dams were poorer in species, and species richness showed a marginal tendency (P=0.0515) to increase upstream of the Cambalache dam three months after its removal. The two small lowland dams studied herein limited the upstream extent of marine species, which recolonized upstream sites of the Río Grande de Arecibo after removal of the Cambalache dam. An estimate of relative density (catch per unit effort) of common native freshwater species was higher above these two dams, and decreased at upstream sites after removal of the Cambalache dam. The estimated relative density of a native freshwater species that is of conservation concern, the American eel (Anguilla rostrata), was reduced above dams, and increased upstream of the former Cambalache dam after its removal. </p> <p>4. In extensive surveys conducted previously in Puerto Rico, sampling was concentrated higher in the watershed, and native fishes were more common and abundant below than above dams. The present work was conducted near the river mouth, and opposite results were observed. These contrasting results suggest that the effects of dams (or dam removal) on fish assemblages vary along the river gradient, although data from other systems are needed to confirm this.</p> <p>5. The present results suggest low-head dam removal to be a viable method of restoring connectivity in fish assemblages in lower reaches of rivers in Puerto Rico and, potentially, other tropical islands. Removal of dams near the mouth of the river appears to be of particular benefit to marine fish species that use lower river reaches.</p>
Data from: Responses of macroinvertebrate communities to small dam removals: implications for bioassessment and restoration
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Supporting tables and figures for Cancel Villamil JJ, Locke SA (2022) - Fish assemblage response to removal of a low‐head dam in the lower reach of a tropical island river, Freshwater Biology
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Supplementary material 1 from: Shaffer JA, Parks D, Campbell K, Moragne A, Hueske B, Adams P, Bauman JM (2023) Coastal beaver, Chinook, coho, chum salmon and trout response to nearshore changes resulting from diking and large-scale dam removals: synergistic ecosystem engineering and restoration in the coastal zone. Nature Conservation 53: 61-83. https://doi.org/10.3897/natureconservation.53.85421
Mean woody plant abundance surveyed from the riparian and shrub-emergent marsh vegetation
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.