Habitat for pollinators is declining worldwide, threatening the health of both wild and agricultural ecosystems. Photovoltaic solar energy installation booming, frequently near lands, where land underneath ground-mounted photovoltaic panels traditionally unused. Some developers agriculturalists in United States are filling understory with habitat pollinating insects efforts to maximize land-use efficiency lands. However, impact panel canopy on pollinator-plant community unknown. Here we...

Rangelands are significant providers of ecosystem services in agroecosystems world‐wide. Yet few studies have investigated how different intensities livestock grazing impact one important provider these services—native bees. We conducted the first large‐scale manipulative study on effect a gradient native bees 16 40‐ha pastures Pacific Northwest Bunchgrass Prairie. Each pasture was exposed to four cattle stocking rates for two years and intensity quantified by measuring utilization. measured...

Abstract One common problem encountered when restoring grasslands is the prominence of non‐native plant species. It unclear what effect plants have on habitat quality grassland passerines, which are among most imperiled groups birds. In 2004 and 2005, we compared patterns avian reproduction mechanisms that might influence those across a gradient 13 in Zumwalt Prairie northeastern Oregon vary degree cover (0.9–53.4%). We monitored fate 201 nests all breeding species these pastures found no...

Native bees are important ecologically and economically because their role as pollinators fulfills a vital ecosystem service. Pollinators declining due to various factors, including habitat degradation destruction. Grasslands, an for native bees, particularly vulnerable. One highly imperiled understudied grassland type in the United States is Pacific Northwest Bunchgrass Prairie. No studies have examined bee communities this prairie type. To fill gap, fauna of Zumwalt Prairie, large,...

Many pollinator populations are experiencing declines, emphasizing the need for a better understanding of complex relationship between bees and flowering plants. Using DNA metabarcoding to describe plant-pollinator interactions eliminates many challenges associated with traditional methods has potential reveal more comprehensive foraging behaviour life history. Here we use ITS2 rbcL gene regions identify plant species present in pollen loads 404 from three habitats eastern Oregon. Our...

Recent global declines of pollinator populations have highlighted the importance pollinators, which are undervalued despite essential contributions to ecosystem services. To identify critical knowledge gaps about we describe state responses pollinators and their foraging nesting resources historical natural disturbances new stressors in Great Plains grasslands riparian ecosystems. In addition, also provide information management research needs guide efforts sustain by extension, flowering...

We examined the impact of environmental conditions on sex pheromone and mating behavior cockroach, Nauphoeta cinerea. Previous research this species has shown that female during courtship reflects mate choice, male correlates with social status, is character used by females to assess males. In present study, males were allowed develop from adult emergence sexual maturity in either a high- or low-quality environment. The environment affected quantities components. found significantly less...

Cultural practices and insecticide treatments combinations were evaluated for effect on tuber damage by potato tuberworm, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) in the Columbia basin of eastern Oregon Washington. A range intervals between initial application several insecticides vine-kill tested to determine how early implement a program control tuberworm damage. Esfenvalerate, methamidophos, methomyl applied at recommended intervals, with programs beginning from 28 5 d...

Many federal, state, and tribal agencies, as well nonprofit organizations, have recently increased efforts to understand how natural areas can be managed enhance native pollinators the ecosystem services they provide. However, managing this important group must balanced with other that provide including hunting, timber production, livestock grazing. Significant knowledge gaps exist about effectively manage habitats used by large ungulates (e.g., cattle (Bos taurus), elk (Cervus elaphus),...

A landscape-scale study from 2004 to 2006 investigated the spatial and temporal dynamics of a new pest Columbia Basin Pacific Northwest, potato tuberworm, Phthorimaea operculella (Zeller). Male P. were monitored in spring, summer, fall each year with pheromone-baited trapping network Oregon Washington. The objectives (1) describe recent outbreak region (2) examine relationship distribution weather (air temperature, precipitation, dew point) geographic variables (elevation latitude). Weather...

Spiders (Araneae) play key roles in ecosystems, not only as common and abundant generalist predators, but also major contributors to biodiversity many areas. In addition, due their short generation times high mobility, spiders respond rapidly small changes environment, potentially making them useful indicators for restoration monitoring. However, few studies have focused on spider responses grassland the United States. We compared degraded, native, restored sites examine how communities...

ABSTRACT River reaches are often subject to multiple co‐occurring anthropogenic stressors. Disentangling the relative impacts of different stressors is important in developing river management strategies. Bio‐assessments using taxonomically based metrics (e.g. taxa richness and diversity) frequently used as a means determining impact on reach quality. Although this method has been successful quality, limited their ability distinguish mechanisms thus importance In contrast, biological traits...

DNA metabarcoding of pollen is a useful tool for studying bee foraging ecology. However, several questions about this method remain unresolved, including the extent to which sequence read data quantitative, type count removal threshold use and how that choice affects our ability detect rare flower visits, artefacts may confound conclusions behavior. To address these questions, we isolated from five plant species created treatments comprised each alone combinations multiple varied in richness...

Native bees are declining worldwide, but conserving or restoring their habitat requires a better understanding of bee-flower associations. High quality bee includes flowers that provide pollen and nectar preferred by bees. However, little data exist about which plants commonly used in the Pacific Northwest, whether prefer certain plant characteristics over others. We examined communities an Oregon riparian ecosystem. Our purpose was to describe bee-plant associations, determine most...

In the western United States, up to 90% of quaking aspen (Populus tremuloides Michx.) is estimated have disappeared since European settlement due human activities. This loss poses a significant threat many forms biodiversity associated with aspen, including plants, birds, and mammals. However, no work has investigated native bee diversity aspen. Our objectives were to: (1) describe diversity, taxonomic composition, sex ratios bees in stands bunchgrass prairie northeastern Oregon, (2) compare...

In recent years restoration project efforts in arid grasslands of the Pacific Northwest have increased; however, little is known about bee communities these areas or how affects them. Native bees provide an essential ecosystem service through pollination crops and native plants understanding their response to a high priority. To address this issue, we conducted three‐year study bunchgrass prairie with three objectives: (1) describe community unique grassland type its temporal variability;...

Abstract The potato tuberworm, Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), is an important pest of solanaceous crops including [ Solanum tuberosum L. (Solanaceae)]. Recent evidence survival the in Columbia Basin Oregon and Washington, USA, surprising as tuberworm most commonly a tropical subtropical regions. Potato was studied manipulative experiment to determine how stage (egg, larva, pupa) soil depth affected potential for winter survival. In early January 2007, eggs, tubers...

Silene spaldingii S. Watson (Spalding's catchfly) is a threatened wildflower that relies on insect-mediated pollination. However, its pollination ecology not well understood, particularly in the Zumwalt Prairie of northeastern Oregon, which contains largest known population. Our objectives were to: (1) describe principal insect visitors to Prairie, (2) quantify available pool pollinators area, and (3) determine whether visitation rate individual plants associated with density at patch scale,...

The western bumble bee, Bombus occidentalis, is included on the red list of bees by Xerces Society. It was once a common bee west Cascades but in late 1990s it experienced dramatic decline along coastal regions. cause speculated to be due introduction pathogens from captive-bred used for pollination greenhouse crops. In extensive surveys conducted and southern Oregon, 10 individuals have been recorded since 2000. this note, we report collection 49 individual B. occidentalis over two years...

ABSTRACT Small, low‐head diversion dams are capable of withdrawing much the flow a river, often resulting in elevated water temperatures. Accelerated growth and development aquatic invertebrates has been demonstrated warmer temperatures, suggesting that timing insect emergence adult body size may be significantly altered by withdrawals. To examine influence summer withdrawals on invertebrate life histories, mass three holometabolous species were monitored continuously for 9–10 weeks Umatilla...