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Ecological Applications: a Publication of the Ecological Society of America

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https://www.readbyqxmd.com/read/28329422/patterns-in-greater-sage-grouse-population-dynamics-correspond-with-public-grazing-records-at-broad-scales
#1
Adrian P Monroe, Cameron L Aldridge, Timothy J Assal, Kari E Veblen, David A Pyke, Michael L Casazza
Human land use, such as livestock grazing, can have profound yet varied effects on wildlife interacting within common ecosystems, yet our understanding of land-use effects is often generalized from short-term, local studies that may not correspond with trends at broader scales. Here we used public land records to characterize livestock grazing across Wyoming, USA, and we used Greater Sage-grouse (Centrocercus urophasianus) as a model organism to evaluate responses to livestock management. With annual counts of male Sage-grouse from 743 leks (breeding display sites) during 2004-2014, we modeled population trends in response to grazing level (represented by a relative grazing index) and timing across a gradient in vegetation productivity as measured by the Normalized Vegetation Difference Index (NDVI)...
March 22, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28317278/species-traits-help-predict-small-mammal-responses-to-habitat-homogenization-by-an-invasive-grass
#2
Joseph P Ceradini, Anna D Chalfoun
Invasive plants can negatively affect native species, however, the strength, direction, and shape of responses may vary depending on the type of habitat alteration and the natural history of native species. To prioritize conservation of vulnerable species, it is therefore critical to effectively predict species' responses to invasive plants, which may be facilitated by a framework based on species' traits. We studied the population and community responses of small mammals and changes in habitat heterogeneity across a gradient of cheatgrass (Bromus tectorum) cover, a widespread invasive plant in North America...
March 20, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28317257/top-down-control-of-carbon-sequestration-grazing-affects-microbial-structure-and-function-in-salt-marsh-soils
#3
Peter Mueller, Dirk Granse, Stefanie Nolte, Hai Thi Do, Magdalena Weingartner, Stefan Hoth, Kai Jensen
Tidal wetlands have been increasingly recognized as long-term carbon sinks in recent years. Work on carbon sequestration and decomposition processes in tidal wetlands focused so far mainly on effects of global-change factors such as sea-level rise and increasing temperatures. However, little is known about effects of land use, such as livestock grazing, on organic matter decomposition and ultimately carbon sequestration. The present work aims at understanding the mechanisms by which large herbivores can affect organic matter decomposition in tidal wetlands...
March 20, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28295816/functional-diversity-response-to-hardwood-forest-management-varies-across-taxa-and-spatial-scales
#4
Bryan D Murray, Jeffrey D Holland, Keith S Summerville, John B Dunning, Michael R Saunders, Michael A Jenkins
Contemporary forest management offers a trade-off between the potential positive effects of habitat heterogeneity on biodiversity, and the potential harm to mature-forest communities caused by habitat loss and perforation of the forest canopy. While the response of taxonomic diversity to forest management has received a great deal of scrutiny, the response of functional diversity is largely unexplored. However, functional diversity may represent a more direct link between biodiversity and ecosystem function...
March 15, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28295789/acoustic-telemetry-and-fisheries-management
#5
Glenn T Crossin, Michelle R Heupel, Christopher M Holbrook, Nigel E Hussey, Susan K Lowerre-Barbieri, Vivian M Nguyen, Graham D Raby, Steven J Cooke
This paper reviews the use of acoustic telemetry as a tool for addressing issues in fisheries management, and serves as the lead to the special Feature Issue of Ecological Applications titled "Acoustic Telemetry and Fisheries Management". Specifically, we provide an overview of the ways in which acoustic telemetry can be used to inform issues central to the ecology, conservation, and management of exploited and/or imperiled fish species. Despite great strides in this area in recent years, there are comparatively few examples where data have been applied directly to influence fisheries management and policy...
March 15, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28266146/variable-competitive-effects-of-fungicide-resistance-in-field-experiments-with-a-plant-pathogenic-fungus
#6
Christina H Hagerty, Ryan C Graebner, Kathryn E Sackett, Christopher C Mundt
Classic evolutionary theory suggests that mutations associated with antimicrobial and pesticide resistance result in a fitness cost in the absence of the selective antimicrobial agent or pesticide. There is experimental evidence to support fitness costs associated with resistance to anti-microbial compounds and pesticides across many biological disciplines, including human pathology, entomology, plant sciences, and plant pathology. However, researchers have also found examples of neutral and increased fitness associated with resistance, where the effect of a given resistance mutation depends on environmental and biological factors...
March 7, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28263450/wild-connected-and-diverse-building-a-more-resilient-system-of-protected-areas
#7
R Travis Belote, Matthew S Dietz, Clinton N Jenkins, Peter S McKinley, G Hugh Irwin, Timothy J Fullman, Jason C Leppi, Gregory H Aplet
Current systems of conservation reserves may be insufficient to sustain biodiversity in the face of climate change and habitat losses. Faced with these pressures, calls have been made to protect the Earth's remaining wildlands and complete the system of protected areas by establishing conservation reserves that (i) better represent ecosystems; (ii) increase connectivity to facilitate biota movement in response to stressors including climate change; and (iii) promote species persistence within intact landscapes...
March 6, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28263426/linking-river-flow-regimes-to-riparian-plant-guilds-a-community-wide-modeling-approach
#8
David A Lytle, David M Merritt, Jonathan D Tonkin, Julian D Olden, Lindsay V Reynolds
Modeling riparian plant dynamics along rivers is complicated by the fact that plants have different edaphic and hydrologic requirements at different life-stages. With intensifying human demands for water and continued human alteration of rivers, there is a growing need for predicting responses of vegetation to flow alteration, including responses related to climate change and river flow management. We developed a coupled structured population model that coombines stage-specific responses of plant guilds with specific attributes of river hydrologic regime...
March 6, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28263423/hydrological-niche-models-predict-water-plant-functional-group-distributions-in-diverse-wetland-types
#9
David C Deane, Jason M Nicol, Susan L Gehrig, Claire Harding, Kane T Aldridge, Abigail M Goodman, Justin D Brookes
Human use of water resources threatens environmental water supplies. If resource managers are to develop policies that avoid unacceptable ecological impacts, some means to predict ecosystem response to changes in water availability is necessary. This is difficult to achieve at spatial-scales relevant for water resource management because of the high natural variability in ecosystem hydrology and ecology. Water plant functional groups classify species with similar hydrological niche preferences together, allowing a qualitative means to generalise community responses to changes in hydrology...
March 6, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28263421/modelling-moose-forest-interactions-under-different-predation-scenarios-at-isle-royale-national-park-usa
#10
Nathan R De Jager, Jason J Rohweder, Brian R Miranda, Brian R Sturtevant, Timothy J Fox, Mark C Romanski
Loss of top predators may contribute to high ungulate population densities and chronic over-browsing of forest ecosystems. However, spatial and temporal variability in the strength of interactions between predators and ungulates occurs over scales that are much shorter than the scales over which forest communities change, making it difficult to characterize trophic cascades in forest ecosystems. We applied the LANDIS-II forest succession model and a recently developed ungulate browsing extension to model how the moose population could interact with the forest ecosystem of Isle Royale National Park, USA, under three different wolf predation scenarios...
March 6, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28263420/integrating-ecological-theories-and-traits-in-process-based-modeling-of-macroinvertebrate-community-dynamics-in-streams
#11
Cédric P Mondy, Nele Schuwirth
Predicting the composition and dynamics of communities is a challenging but useful task to efficiently support ecosystem management. Community ecology has developed a number of promising theories, including food webs, metabolic theory, ecological stoichiometry and environmental filtering. Their joint implementation in a mechanistic modeling framework should help us to bring community ecology to a new level by improving its predictive abilities. One of the challenges lies in the proper consideration of model uncertainty...
March 6, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28208227/integrating-remotely-sensed-fires-for-predicting-deforestation-for-redd
#12
Dolors Armenteras, Cerian Gibbes, Jesús A Anaya, Liliana M Dávalos
Fire is an important tool in tropical forest management, as it alters forest composition, structure, and the carbon budget. The United Nations program on Reducing Emissions from Deforestation and Forest Degradation (REDD+) aims to sustainably manage forests, as well as conserve and enhance their carbon stocks. Despite the crucial role of fire management, decision-making on REDD+ interventions fails to systematically include fires. Here, we address this critical knowledge gap in two ways. First, we review REDD+ projects and programs to assess the inclusion of fires in monitoring, reporting and verification (MRV) systems...
February 16, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28188660/assessing-the-importance-of-demographic-parameters-for-population-dynamics-using-bayesian-integrated-population-modeling
#13
Daniel R Eacker, Paul M Lukacs, Kelly M Proffitt, Mark Hebblewhite
To successfully respond to changing habitat, climate or harvest, managers need to identify the most effective strategies to reverse population trends of declining species and/or manage harvest of game species. A classic approach in conservation biology for the last two decades has been the use of matrix population models to determine the most important vital rates affecting population growth rate (λ), that is, sensitivity. Ecologists quickly realized the critical role of environmental variability in vital rates affecting population growth rate by developing approaches such as life-stage simulation analysis (LSA) that account for both sensitivity and variability of a vital rate...
February 11, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28182314/exotic-weeds-and-fluctuating-microclimate-can-constrain-native-plant-regeneration-in-urban-forest-restoration
#14
K J Wallace, Daniel C Laughlin, Bruce D Clarkson
Restoring forest structure and composition is an important component of urban land management, but we lack clear understanding of the mechanisms driving restoration success. Here we studied two indicators of restoration success in temperate rainforests: native tree regeneration and epiphyte colonization. We hypothesized that ecosystem properties such as forest canopy openness, abundance of exotic herbaceous weeds, and the microclimate directly affect the density and diversity of native tree seedlings and epiphytes...
February 9, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28182303/variable-effects-of-climate-on-forest-growth-in-relation-to-climate-extremes-disturbance-and-forest-dynamics
#15
Malcolm S Itter, Andrew O Finley, Anthony W D'Amato, Jane R Foster, John B Bradford
Changes in the frequency, duration, and severity of climate extremes are forecast to occur under global climate change. The impacts of climate extremes on forest productivity and health remain difficult to predict due to potential interactions with disturbance events and forest dynamics-changes in forest stand composition, density, size and age structure over time. Such interactions may lead to non-linear forest growth responses to climate involving thresholds and lag effects. Understanding how forest dynamics influence growth responses to climate is particularly important given stand structure and composition can be modified through management to increase forest resistance and resilience to climate change...
February 9, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28178755/unmanned-aerial-vehicles-uavs-for-surveying-marine-fauna-assessing-detection-probability
#16
Amanda Hodgson, David Peel, Natalie Kelly
Aerial surveys are conducted for various fauna to assess abundance, distribution, and habitat use over large spatial scales. They are traditionally conducted using light-aircraft with observers recording sightings in real time. Unmanned Aerial Vehicles (UAVs) offer an alternative with many potential advantages, including eliminating human-risk. To be effective, this emerging platform needs to provide detection rates of animals comparable to traditional methods. UAVs can also acquire new types of information, and this new data requires a re-evaluation of traditional analyses used in aerial surveys; including estimating the probability of detecting animals...
February 8, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28171704/subdivision-design-and-stewardship-affect-bird-and-mammal-use-of-conservation-developments
#17
Cooper M Farr, Liba Pejchar, Sarah E Reed
Developing effective tools for conservation on private lands is increasingly important for global biodiversity conservation; private lands are located in more productive and biologically diverse areas, and they face accelerated rates of land conversion. One strategy is conservation development (CD) subdivisions, which cluster houses in a small portion of a property and preserve the remaining land as protected open space. Despite widespread use, the characteristics that make CD more or less effective at achieving biodiversity conservation are not well understood...
February 7, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28165643/toward-inventory-based-estimates-of-soil-organic-carbon-in-forests-of-the-united-states
#18
G M Domke, C H Perry, B F Walters, L E Nave, C W Woodall, C W Swanston
Soil organic carbon (SOC) is the largest terrestrial carbon (C) sink on Earth; this pool plays a critical role in ecosystem processes and climate change. Given the cost and time required to measure SOC, and particularly changes in SOC, many signatory nations to the United Nations Framework Convention on Climate Change report estimates of SOC stocks and stock changes using default values from the Intergovernmental Panel on Climate Change or country-specific models. In the United States (US), SOC in forests is monitored by the national forest inventory (NFI) conducted by the Forest Inventory and Analysis (FIA) program within the US Department of Agriculture, Forest Service...
February 6, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28140527/fish-wariness-is-a-more-sensitive-indicator-to-changes-in-fishing-pressure-than-abundance-length-or-biomass
#19
Jordan S Goetze, Fraser A Januchowski-Hartley, Joachim Claudet, Tim J Langlois, Shaun K Wilson, Stacy D Jupiter
Identifying the most sensitive indicators to changes in fishing pressure is important for accurately detecting impacts. Biomass is thought to be more sensitive than abundance and length, while the wariness of fishes is emerging as a new metric. Periodically harvested closures (PHCs) that involve the opening and closing of an area to fishing are the most common form of fisheries management in the western Pacific. The opening of PHCs to fishing provides a unique opportunity to compare the sensitivity of metrics, such as abundance, length, biomass and wariness, to changes in fishing pressure...
January 31, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28140503/two-step-adaptive-management-for-choosing-between-two-management-actions
#20
Alana L Moore, Leila Walker, Michael C Runge, Eve McDonald-Madden, Michael A McCarthy
Adaptive management is widely advocated to improve environmental management. Derivations of optimal strategies for adaptive management, however, tend to be case specific and time consuming. In contrast, managers might seek relatively simple guidance, such as insight into when a new potential management action should be considered, and how much effort should be expended on trialing such an action. We constructed a two time-step scenario where a manager is choosing between two possible management actions. The manager has a total budget which can be split between a learning phase and an implementation phase...
January 31, 2017: Ecological Applications: a Publication of the Ecological Society of America
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