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Fish eggs collected in the St. Clair, Detroit, and St. Marys rivers, 2005-2022 Fish eggs collected in the St. Clair, Detroit, and St. Marys rivers, 2005-2022
A long-term, multiseason, fish egg sampling program is conducted annually on the Detroit, Saint Clair, and Saint Marys rivers to identify where productive fish spawning habitat currently exists and evaluate habitat restoration projects. Egg mats were placed on the river bottom during the spring and fall at historic spawning areas, candidate fish spawning habitat restoration sites, and...
Substrate hardness and walleye (Sander vitreus) and lake whitefish (Coregonus clupeaformis) egg presence in Saginaw Bay, Lake Huron, before and after substrate cleaning experiments and walleye hatching success experiments, 2018-2019 Substrate hardness and walleye (Sander vitreus) and lake whitefish (Coregonus clupeaformis) egg presence in Saginaw Bay, Lake Huron, before and after substrate cleaning experiments and walleye hatching success experiments, 2018-2019
These data include a field study of the sediment hardness and fish egg density (walleye [Sander vitreus] and lake whitefish [Coregonus clupeaformis]) after sediment cleaning treatments (propulsion sled or hydro-jet sled) conducted at two reef locations in Saginaw Bay, Lake Huron, during 2018 and 2019. The data includes the year, species, reef, treatment type (jet, fan, control), number...
Airborne magnetic and radiometric survey, Virginia and North Carolina Fall Zone, 2021 Airborne magnetic and radiometric survey, Virginia and North Carolina Fall Zone, 2021
This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over Virginia and North Carolina along and near the eastern U.S. 'Fall Zone', which represents the transitional area between Atlantic Coastal Plain sediments and Piedmont metamorphic and igneous rocks. The airborne data collection was funded by the U.S. Geological Survey...
Long-term monitoring data from eastern screech owl populations in northern Ohio, 1944-1971 Long-term monitoring data from eastern screech owl populations in northern Ohio, 1944-1971
Data include population information of eastern screech owl (Megascops asio, formerly Otus asio) populations in four counties of northern Ohio. Researchers recorded adult and chick color phases, eggs laid, brood size and location.
Effects of shading on the rare plant species, Trillium texanum (Melanthiaceae) Effects of shading on the rare plant species, Trillium texanum (Melanthiaceae)
The original distribution of the study species Trillium texanum is seep spring baygalls in east-central Texas and extreme northwestern Louisiana. Experiments to determine the effects of shading on T. texanum were conducted using short-term shade cloth treatments (full sunlight vs. 30% shading for 2-3 weeks), and a dryness treatment (moist vs. less moist). Mean height and cover responses...
Effects of shading on the rare plant species, Physostegia correllii (Lamiaceae) Effects of shading on the rare plant species, Physostegia correllii (Lamiaceae)
The original distribution of the study species Physostegia correllii included freshwater floodplains of large rivers in the southcentral U.S. (Colorado, Rio Grande, Mississippi). Experiments to determine the effects of shading on P. correllii were conducted using short-term shade cloth treatments (full sunlight vs. 30% shading for 2-3 weeks). Mean height and cover responses of...