Mark Vandever

Native Bee Genera in Colorado Conservation Reserve Program Fields, Collected from 2012-2014

Data included in this data set are for blue vane trap captured native bees from Logan County, Colorado starting in 2012 and ending in 2014. Data collected were the number of bees captured per date, per field, and identified to genus. Net level data contains 16,229 records.

Categories: Data; Tags: Bees, Colorado, Conservation Reserve Program, Logan County, USGS Science Data Catalog (SDC), All tags... biota, grasslands, pollinators, Fewer tags

Characteristics, presence of erosional features, and cover of vegetation and bare ground on fields formerly enrolled in grassland, wetland, and wildlife practices of the Conservation Reserve Program in the central and western United States from 2017 to 2018

Data included in this data set are from edge-of-field surveys that recorded the presence of erosional features, cover of vegetation and bare ground, and management activities (e.g., haying) on 1092 fields that had expired from three types of conservation practices (grassland, wetland, and wildlife) in the Conservation Reserve Program. Field sampling data were recorded across six US Department of Agriculture Farm Production Regions (Corn belt, Lake states, Mountain, Northern plains, Pacific, Southern plains) from 2017 to 2018. The study area encompassed all or part of 14 states: Washington, Oregon, Idaho, Montana, North Dakota, South Dakota, Minnesota, Iowa, Missouri, Colorado, Nebraska, Kansas, Oklahoma, and Texas....

Categories: Data; Tags: CRP, Central United States, Colorado, Conservation Reserve Program, Idaho, All tags... Iowa, Kansas, Land Use Change, Minnesota, Missouri, Montana, Nebraska, North Dakota, Oklahoma, Oregon, South Dakota, Texas, USGS Science Data Catalog (SDC), Washington, Western United States, bare soil, biota, canopy cover, ecosystems, erosion, grass management, grassland ecosystems, grazing, gullies, haying, mowing, native forbs, native grasses, noxious forbs, noxious grasses, pedastaling, rills, Fewer tags

Amphibian Occupancy and Effects of Habitat Use on Pesticide Exposure in Iowa Wetlands

Amphibians living in agricultural areas encounter many challenges. Two factors affecting individuals in these landscapes are habitat loss and pesticides. This thesis focuses on amphibians using agricultural wetlands in Iowa, where row crops such as corn and soybeans dominate the landscape. The goal of my first study was to determine the influences of site characteristics on amphibian presence and success. I used occupancy analysis to estimate proportion of area occupied by four species as a function of eight covariates hypothesized to affect occupancy: fish abundance, salamander abundance, invertebrate density, vegetative cover, wetland area, water atrazine concentration, surrounding crop land use, and overall wetland...

Categories: Data; Tags: Agriculture, Amphibian, Ecology, Environmental Health, Known Fate, All tags... Occupancy, Passive Sampling Device, Pesticides, USGS Science Data Catalog (SDC), Wildlife Biology, biota, Fewer tags

Presence of erosional features and cover of grasses, forbs, and bare ground on fields enrolled in grassland, wetland, and wildlife practices of the Conservation Reserve Program in the central and western United States from 2016 to 2018

Data included in this data set are from in-field and edge-of-field surveys that recorded the presence of erosional features and cover of vegetation and bare ground on 1786 Conservation Reserve Program fields across three types of conservation practices (grassland, wetland, and wildlife). Field sampling data were recorded across six US Department of Agriculture Farm Production Regions (Corn belt, Lake states, Mountain, Northern plains, Pacific, Southern plains) from 2016 to 2018. The study area encompassed all or part of 14 states: Washington, Oregon, Idaho, Montana, North Dakota, South Dakota, Minnesota, Iowa, Missouri, Colorado, Nebraska, Kansas, Oklahoma, and Texas. These data constitute the first national level...

Categories: Data; Tags: CRP, Canopy cover, Central United States, Colorado, Conservation Reserve Program, All tags... Idaho, Iowa, Kansas, Minnesota, Missouri, Montana, Nebraska, North Dakota, Oklahoma, Oregon, South Dakota, Texas, USGS Science Data Catalog (SDC), Washington, Western United States, bare soil, biota, ecosystems, erosion, grassland ecosystems, gullies, native forbs, native grasses, noxious forbs, noxious grasses, pedastaling, rills, Fewer tags

Pesticide residues in passive samplers and bee tissue from Conservation Reserve Program fields across an agricultural gradient in eastern Iowa, USA, 2019

This data release includes sampling location, pesticide concentrations in passive samplers (silicone bands) and bees foraging in Conservation Reserve Program fields. Sampling took place during July and August of 2019. Fields were located on private land managed for the U.S. Department of Agriculture Conservation Reserve Program in eastern central Iowa, U.S.A.

Tags: Environmental Health, Iowa, Land Use Change, Land Use Change, USGS Science Data Catalog (SDC), All tags... bees, biota, insects, invasion history, otolith microchemistry, pesticides, Fewer tags