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- Goldenrods, Herbivores, and Natural Enemies (2)
- Biological control (1)
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- Competition (1)
- Cost of Resistance (1)
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- Seed coat (1)
- Seed predation (1)
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Articles 1 - 8 of 8
Full-Text Articles in Entire DC Network
National Park Service Cave Ecology Inventory And Monitoring Framework, Gretchen M. Baker, Steven J. Taylor, Shawn Thomas, Rick Olson, Kathy Lavoie, Marie Denn, Steven Thomas, Hazel Barton, Kurt Helf, Rene Ohms, Joel Despain, Jim Kennedy, David Larson
National Park Service Cave Ecology Inventory And Monitoring Framework, Gretchen M. Baker, Steven J. Taylor, Shawn Thomas, Rick Olson, Kathy Lavoie, Marie Denn, Steven Thomas, Hazel Barton, Kurt Helf, Rene Ohms, Joel Despain, Jim Kennedy, David Larson
Hazel Barton
A team developed the Cave Ecology Inventory and Monitoring Framework for National Park Service (NPS) units. It contains information for NPS cave managers across the United States to determine how to inventory and monitor cave ecology. Due to the wide geographical scope of NPS caves and their many different types, the document does not prescribe exact protocols. Instead, it provides guidance for what types of inventory and monitoring are possible, a framework for deciding how to prioritize inventory and monitoring activities, and references to specific protocols that are already in place at NPS cave parks. Keywords: cave ecology, cave microbiology, …
Spatial–Temporal Dynamics Of Stable Fly (Diptera: Muscidae) Trap Catches In Eastern Nebraska, David B. Taylor, Kristina Friesen, Jerry J. Zhu
Spatial–Temporal Dynamics Of Stable Fly (Diptera: Muscidae) Trap Catches In Eastern Nebraska, David B. Taylor, Kristina Friesen, Jerry J. Zhu
David B. Taylor
Spatial and temporal relationships among catches of adult stable flies, Stomoxys calcitrans (L.), on sticky traps in eastern Nebraska were evaluated. Twenty-five alsynite sticky traps were placed in a 5 by 5 grid with 1.6-km intervals in a mixed agricultural environment from 2003 to 2011. Denser grids of 45-90 traps were implemented for varying lengths of time during the course of the study. More than two million stable flies were collected over 9 yr. Seasonal abundances based upon total collections from the primary grid of 25 traps were bimodal most years with population peaks in June and September or October. …
Modeling Simultaneous Selection For Resistance And Tolerance In Goldenrod (Solidago Altissima) Across A Range Of Spittlebug Population Densities, Michael J. Wise, Warren G. Abrahamson Ii
Modeling Simultaneous Selection For Resistance And Tolerance In Goldenrod (Solidago Altissima) Across A Range Of Spittlebug Population Densities, Michael J. Wise, Warren G. Abrahamson Ii
Warren G. Abrahamson, II
Plant defenses against herbivory include two main strategies: resistance (to minimize the amount of damage) and tolerance (to minimize the fitness impact of that damage). Recent studies have emphasized the need to consider both strategies simultaneously for a fuller understanding of the evolutionary and ecological dynamics of plant defense against herbivores. We used a combination of a garden study, a greenhouse experiment, and mathematical modeling to investigate resistance to and tolerance of spittlebug damage in the goldenrod Solidago altissima. In contrast to traditional expectations, the genetic correlation between resistance and tolerance was highly positive. Selection gradients indicated that directional selection …
The Effect Of Resource Stress On Goldenrod's Tolerance Of Folivory Depends More On The Identity Of The Stress Than On The Severity Of The Stress, Peter J. March, Michael J. Wise, Warren G. Abrahamson Ii
The Effect Of Resource Stress On Goldenrod's Tolerance Of Folivory Depends More On The Identity Of The Stress Than On The Severity Of The Stress, Peter J. March, Michael J. Wise, Warren G. Abrahamson Ii
Warren G. Abrahamson, II
It is widely accepted that the levels of resources in a plant’s environment can influence the plant’s ability to compensate for (i.e., tolerate) damage by herbivores. However, predicting the direction of the influence has proven difficult. Here, we report on a greenhouse study in which individuals of Solidago altissima were exposed to factorial combinations of light and fertilization levels to investigate how different types of stresses affect plants’ ability to tolerate leaf damage by larvae of the beetle Trirhabda virgata. Shade stress reduced the plants’ tolerance of herbivory, while nutrient stress had no effect on tolerance. These results did not …
Molecules, Morphology And Fossils: A Comprehensive Approach To Odonate Phylogeny And The Evolution Of The Odonate Wing, T. Heath Ogden
Molecules, Morphology And Fossils: A Comprehensive Approach To Odonate Phylogeny And The Evolution Of The Odonate Wing, T. Heath Ogden
T. Heath Ogden
We undertook a comprehensive morphological and molecular phylogenetic analysis of dragonfly phylogeny, examining both extant and fossil lineages in simultaneous analyses. The legitimacy of higher-level family groups and the phylogenetic relationship between families were tested. Thirteen families were supported as monophyletic (Aeshnidae, Calopterygidae, Chlorocyphidae, Euphaeidae, Gomphidae, Isostictidae, Lestidae, Libellulidae, Petaluridae, Platystictidae, Polythoridae, Pseudostigmatidae and Synthemistidae) and eight as non-monophyletic (Amphipterygidae, Coenagrionidae, Corduliidae, Megapodagrionidae, Protoneuridae and Synlestidae), although Perilestidae and Platycnemididae were recovered as monophyletic under Bayesian analyses. Nine families were represented by one species, thus monophyly was not tested (Epiophlebiidae, Austropetaliidae, Chlorogomphidae, Cordulegastridae, Macromiidae, Chorismagrionidae, Diphlebiidae, Lestoideidae and Pseudolestidae). Epiprocta …
The Strength Of Seeds And Their Destruction By Granivorous Insects, Jonathan G. Lundgren, Kurt A. Rosentrater
The Strength Of Seeds And Their Destruction By Granivorous Insects, Jonathan G. Lundgren, Kurt A. Rosentrater
Kurt A. Rosentrater
The influence of seed structure and strength on their destruction by granivores is central to understanding the dynamics of granivore-plant interactions. For up to nine seed species, the effects of seed size (cm3), mass (mg), density (mg/cm3) and coat strength (MPa) on the damage inflicted by three post-dispersal granivores (Harpalus pensylvanicus, Anisodactylus sanctaecrucis, and Gryllus pennsylvanicus) were evaluated. Seed destruction rates by G. pennsylvanicus were statistically unrelated to the size and toughness of the seeds. Seed densities significantly affected their destruction by A. sanctaecrucis and H. pensylvanicus, as did seed size, mass, and strength in H. pensylvanicus under choice conditions. …
Correlations Among Traits Associated With Herbivore Resistance And Pollination: Implications For Pollination And Nectar Robbing In A Distylous Plant, Rebecca E. Irwin, Lynn Adler
Correlations Among Traits Associated With Herbivore Resistance And Pollination: Implications For Pollination And Nectar Robbing In A Distylous Plant, Rebecca E. Irwin, Lynn Adler
Lynn Adler
Plants interact simultaneously with a diversity of visitors, including herbivores and pollinators. Correlations among traits associated with herbivory and pollination may constrain the degree to which plants can evolve in response to any one interactor. Using the distylous plant, Gelsemium sempervirens, we tested the hypothesis that traits typically associated with pollination (distyly) and herbivore resistance (secondary compounds) were phenotypically correlated and examined how these traits influenced plant interactions with floral visitors. The flowers of G. sempervirens are visited by pollinators and a nectar robber, and the leaves and flowers express gelsemine, an alkaloid that is deterrent and sometimes toxic to …
Prey Depletion By Odonate Larvae: Combining Evidence From Multiple Field Experiments, Clay L. Pierce, Dan M. Johnson, Thomas H. Martin, Charles N. Watson, Robert E. Bohanan, Philip H. Crowley
Prey Depletion By Odonate Larvae: Combining Evidence From Multiple Field Experiments, Clay L. Pierce, Dan M. Johnson, Thomas H. Martin, Charles N. Watson, Robert E. Bohanan, Philip H. Crowley
Clay L. Pierce
In this paper we re-analyze previously published data regarding the response of several prey populations to manipulation of predaceous larval dragonfly (Insecta: Odonata) densities in four separate field enclosure experiments. Using a computer-intensive "rerandomization" approach to testing hypotheses, we show that the individual experiments were not sufficiently powerful to consistently reject false null hypotheses. Combining the data from three comparable experiments, we can enhance the power associated with such tests. Three prey categories (Trichoptera, Oligochaeta, and large Cladocera), constituting less than one-third of the typical odonate diet, were found to be consistently depleted in enclosures with odonate larvae; but the …