Allison Roy

Fish Surveys within 500-meters of Alasmidonta heterodon in the Connecticut and Delaware Watersheds from 1999 - 2019

The dwarf wedgemussel (Alasmidonta heterodon) is a federally endangered freshwater mussel that once ranged from New Brunswick to North Carolina, but now only exists in isolated populations throughout its diminished range. This study aimed to understand links between fish abundance and dwarf wedgemussel abundance and occurrence in the Connecticut and Delaware watersheds. Specifically, my study objectives were to 1) characterize fish assemblages near dwarf wedgemussel locations and unoccupied locations, 2) determine if dwarf wedgemussel occurrence and abundance are related to abundance of the known host fish species, tessellated darter and other potential host fish species per St. John White et. al. (2017). Two fish...

Categories: Data; Tags: Connecticut, Massachusetts, New England, New Hampshire, New Jersey, All tags... New York, USGS-EMA-LOW-SB SMC: Freshwater mussels, biota, dwarf wedgemussel, environment, field sampling, fish, fish surveys, tesselated darter, unionid, Fewer tags

Data used to test a video monitoring and computational system for estimating juvenile fish abundance

We developed and tested neural network-based models to recognize and count emigrating juvenile river herring in continuous video. Continuous video was collected from an underwater camera installed at Great Herring Pond in Bourne, Massachusetts (USA) between June and November 2017. Our algorithm extracts video frames to assess presence/absence of fish and count numbers of fish emigrating. We used extracted video frames to assess model performance. Provided datasets include information about extracted frames that were used for model assessment. This data release includes four datasets that were used to test model performance and select the best fitting model. (1) The “Model Evaluation Dataset” includes count and presence/absence...

Categories: Data; Tags: Ecology, New England, Massachusetts, Cape Cod, USGS Science Data Catalog (SDC), biota

The Yellow Lampmussel (YLM), Lampsilis cariosa, is a medium-sized freshwater mussel occurring from Georgia, USA to Nova Scotia, Canada (>50% of global population within the Northeast Region). The species is declining throughout its range, is designated as vulnerable by the IUCN (Bogan & Woolnough 2017) and NatureServe (https://explorer.natureserve.org/) and is a Northeast Regional Species of Greatest Conservation Need. It is locally designated as endangered, threatened, or a special status in 6 states within the USFWS North Atlantic-Appalachian region (CT, DE, MA, ME, NJ, WV) and 3 additional states (GA, NC, SC) outside of the region, extirpated in NH, vulnerable to apparently secure in NY and PA, and unknown status...

There is growing evidence that headwater stream ecosystems are especially vulnerable to changing climate and land use, but managers are challenged by the need to address these threats at a landscape scale, often through coordination with multiple management agencies and landowners. This project sought to provide an example of cooperative landscape decision-making by addressing the conservation of headwater stream ecosystems in the face of climate change at the watershed scale. Predictive models were built for critical resources to examine the effects of the potential alternative actions on the objectives, taking account of climate effects and examining whether there are key uncertainties that impede decision making....

Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2013, CASC, Completed, Northeast, Northeast CASC, All tags... Projects by Region, Rivers, Streams and Lakes, Rivers, Streams and Lakes, Water, Coasts and Ice, Water, Coasts and Ice, Fewer tags

A Remote Sensing Approach to Characterize Winter Water Level Drawdown Patterns in Lakes

This data release consists of four datasets that were used for evaluating winter drawdown patterns in 166 Massachusetts lakes greater than 0.3 km2 surface area. The first dataset (“Water area and level.csv”) provides water area and water level time series data of 166 lakes from 2016 to 2021. Water area and water level time-series data were derived from European Space Agency’s Sentinel 1 synthetic aperture radar satellite sensor using the JavaScript code in Google Earth Engine platform. Details of this code were described in the software release (https://doi.org/10.5066/P9ZA5I1U). The second dataset (“Water area interpolated.csv”) is the linearly-interpolated daily water area time series data of the 166 lakes from...

Categories: Data; Tags: Massachusetts, USGS Science Data Catalog (SDC), environment, hydrology, lake, All tags... natural resource management, remote sensing, water level measurements, Fewer tags