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https://www.readbyqxmd.com/read/29352480/temporal-heterogeneity-increases-with-spatial-heterogeneity-in-ecological-communities
#1
Scott L Collins, Meghan L Avolio, Corinna Gries, Lauren M Hallett, Sally E Koerner, Kimberly J La Pierre, Andrew L Rypel, Eric R Sokol, Samuel B Fey, Dan F B Flynn, Sydney K Jones, Laura M Ladwig, Julie Ripplinger, Matt B Jones
Heterogeneity is increasingly recognized as a foundational characteristic of ecological systems. Under global change, understanding temporal community heterogeneity is necessary for predicting the stability of ecosystem functions and services. Indeed, spatial heterogeneity is commonly used in alternative stable state theory as a predictor of temporal heterogeneity and therefore an early indicator of regime shifts. To evaluate whether spatial heterogeneity in species composition is predictive of temporal heterogeneity in ecological communities, we analyzed 68 community datasets spanning freshwater and terrestrial systems where measures of species abundance were replicated over space and time...
January 20, 2018: Ecology
https://www.readbyqxmd.com/read/29350842/from-grey-to-green-efficacy-of-eco-engineering-solutions-for-nature-based-coastal-defence
#2
Rebecca L Morris, Teresa M Konlechner, Marco Ghisalberti, Stephen E Swearer
Climate change is increasing the threat of erosion and flooding along coastlines globally. Engineering solutions (e.g. seawalls and breakwaters) in response to protecting coastal communities and associated infrastructure are increasingly becoming economically and ecologically unsustainable. This has led to recommendations to create or restore natural habitats, such as sand dunes, saltmarsh, mangroves, seagrass and kelp beds, and coral and shellfish reefs, to provide coastal protection in place of (or to complement) artificial structures...
January 19, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29350285/gut-shuttle-service-endozoochory-of-dispersal-limited-soil-fauna-by-gastropods
#3
Manfred Türke, Markus Lange, Nico Eisenhauer
Numerous important ecosystem functions and services depend on soil biodiversity. However, little is known about the mechanisms which maintain the vast belowground biodiversity and about the filters shaping soil community composition. Yet, biotic interactions like facilitation and dispersal by animals are assumed to play a crucial role, particularly as most soil animal taxa are strongly limited in their active dispersal abilities. Here, we report on a newfound interaction of potentially high ubiquity and importance in soil communities: the endozoochorous dispersal of soil fauna by gastropods...
January 19, 2018: Oecologia
https://www.readbyqxmd.com/read/29348647/the-contribution-of-predators-and-scavengers-to-human-well-being
#4
REVIEW
Christopher J O'Bryan, Alexander R Braczkowski, Hawthorne L Beyer, Neil H Carter, James E M Watson, Eve McDonald-Madden
Predators and scavengers are frequently persecuted for their negative effects on property, livestock and human life. Research has shown that these species play important regulatory roles in intact ecosystems including regulating herbivore and mesopredator populations that in turn affect floral, soil and hydrological systems. Yet predators and scavengers receive surprisingly little recognition for their benefits to humans in the landscapes they share. We review these benefits, highlighting the most recent studies that have documented their positive effects across a range of environments...
January 18, 2018: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29346583/datamed-an-open-source-discovery-index-for-finding-biomedical-datasets
#5
Xiaoling Chen, Anupama E Gururaj, Burak Ozyurt, Ruiling Liu, Ergin Soysal, Trevor Cohen, Firat Tiryaki, Yueling Li, Nansu Zong, Min Jiang, Deevakar Rogith, Mandana Salimi, Hyeon-Eui Kim, Philippe Rocca-Serra, Alejandra Gonzalez-Beltran, Claudiu Farcas, Todd Johnson, Ron Margolis, George Alter, Susanna-Assunta Sansone, Ian M Fore, Lucila Ohno-Machado, Jeffrey S Grethe, Hua Xu
Objective: Finding relevant datasets is important for promoting data reuse in the biomedical domain, but it is challenging given the volume and complexity of biomedical data. Here we describe the development of an open source biomedical data discovery system called DataMed, with the goal of promoting the building of additional data indexes in the biomedical domain. Materials and Methods: DataMed, which can efficiently index and search diverse types of biomedical datasets across repositories, is developed through the National Institutes of Health-funded biomedical and healthCAre Data Discovery Index Ecosystem (bioCADDIE) consortium...
January 13, 2018: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/29345744/land-surveys-show-regional-variability-of-historical-fire-regimes-and-structure-of-dry-forests-of-the-western-usa
#6
William L Baker, Mark A Williams
An understanding of how historical fire and structure in dry forests (ponderosa pine, dry mixed conifer) varied across the western USA remains incomplete. Yet, fire strongly affects ecosystem services, and forest restoration programs are underway. We used General Land Office survey reconstructions from the late-1800s across 11 landscapes covering ∼1.9 million ha in four states to analyze spatial variation in fire regimes and forest structure. We first synthesized the state of validation of our methods using 20 modern validations, 53 historical cross-validations, and corroborating evidence...
January 18, 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29345735/landscape-simplification-reduces-classical-biological-control-and-crop-yield
#7
Heather Grab, Bryan Danforth, Katja Poveda, Greg Loeb
Agricultural intensification resulting in the simplification of agricultural landscapes is known to negatively impact the delivery of key ecosystem services such as the biological control of crop pests. Both conservation and classical biological control may be influenced by the landscape context in which they are deployed; yet studies examining the role of landscape structure in the establishment and success of introduced natural enemies and their interactions with native communities are lacking. In this study, we investigated the relationship between landscape simplification, classical and conservation biological control services and importantly, the outcome of these interactions for crop yield...
January 18, 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29342451/decadal-changes-in-the-edible-supply-of-seafood-and-methylmercury-exposure-in-the-united-states
#8
Elsie M Sunderland, Miling Li, Kurt Bullard
BACKGROUND: Methylmercury (MeHg) exposure is associated with adverse effects on neurodevelopment and cardiovascular health. Previous work indicates most MeHg is from marine fish sold in the commercial market, but does not fully resolve supply regions globally. This information is critical for linking changes in environmental MeHg levels to human exposure in the U.S. population. OBJECTIVES: We used available data to estimate the geographic origins of seafood consumed in the United States (major ocean basins, coastal fisheries, aquaculture, freshwater) and how shifts in edible supply affected MeHg exposures between 2000-2002 and 2010-2012...
January 16, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29340233/crustacean-amphipods-from-marsh-ponds-a-nutritious-feed-resource-with-potential-for-application-in-integrated-multi-trophic-aquaculture
#9
Pablo Jiménez-Prada, Ismael Hachero-Cruzado, Inmaculada Giráldez, Catalina Fernández-Diaz, César Vilas, José Pedro Cañavate, José Manuel Guerra-García
Coastal protection, nutrient cycling, erosion control, water purification, and carbon sequestration are ecosystem services provided by salt marshes. Additionally, salt ponds offer coastal breeding and a nursery habitat for fishes and they provide abundant invertebrates, such as amphipods, which are potentially useful as a resource in aquaculture. Fishmeal and fish oil are necessary food resources to support aquaculture of carnivorous species due to their omega-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA)...
2018: PeerJ
https://www.readbyqxmd.com/read/29340133/a-regional-assessment-of-white-tailed-deer-effects-on-plant-invasion
#10
Kristine M Averill, David A Mortensen, Erica A H Smithwick, Susan Kalisz, William J McShea, Norman A Bourg, John D Parker, Alejandro A Royo, Marc D Abrams, David K Apsley, Bernd Blossey, Douglas H Boucher, Kai L Caraher, Antonio DiTommaso, Sarah E Johnson, Robert Masson, Victoria A Nuzzo
Herbivores can profoundly influence plant species assembly, including plant invasion, and resulting community composition. Population increases of native herbivores, e.g. white-tailed deer (Odocoileus virginianus), combined with burgeoning plant invasions raise concerns for native plant diversity and forest regeneration. While individual researchers typically test for the impact of deer on plant invasion at a few sites, the overarching influence of deer on plant invasion across regional scales is unclear. We tested the effects of deer on the abundance and diversity of introduced and native herbaceous and woody plants across 23 white-tailed deer research sites distributed across the east-central and north-eastern USA and representing a wide range of deer densities and invasive plant abundance and identity...
February 2018: AoB Plants
https://www.readbyqxmd.com/read/29339334/eco-compensation-in-china-theory-practices-and-suggestions-for-the-future
#11
Wenxiu Shang, Yicheng Gong, Zhongjing Wang, Michael J Stewardson
Eco-compensation is the most important form of compensatory conservation in China. However, this compensatory mechanism is criticized for vague definition and massive government participation. For better understanding of eco-compensation in China, this paper compares theories and practices of compensatory mechanisms in China and abroad. The analysis of theoretical backgrounds shows that eco-compensation in China is a combination of 'ecological compensation' and 'payments for ecosystem services'. Ten compensatory projects in China and abroad are assessed to reveal characteristics and problems of eco-compensation in China...
January 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29334298/long-term-effects-of-tungsten-carbide-wc-nanoparticles-in-pelagic-and-benthic-aquatic-ecosystems
#12
Mikael T Ekvall, Jonas Hedberg, Inger Odnevall Wallinder, Lars-Anders Hansson, Tommy Cedervall
As the production and usage of nanomaterials are increasing so are the concerns related to the release of the material into nature. Tungsten carbide (WC) is widely used for its hard metal properties, although its use, in for instance tyre studs, may result in nano-sized particles ending up in nature. Here, we evaluate the potential long-term exposure effects of WC nanoparticles on a pelagic (Daphnia magna) and a benthic (Asellus aquaticus) organism. No long-term effects were observed in the benthic system with respect to population dynamics or ecosystem services...
January 15, 2018: Nanotoxicology
https://www.readbyqxmd.com/read/29333264/how-anthropogenic-shifts-in-plant-community-composition-alter-soil-food-webs
#13
REVIEW
Paul Kardol, Jonathan R De Long
There are great concerns about the impacts of soil biodiversity loss on ecosystem functions and services such as nutrient cycling, food production, and carbon storage. A diverse community of soil organisms that together comprise a complex food web mediates such ecosystem functions and services. Recent advances have shed light on the key drivers of soil food web structure, but a conceptual integration is lacking. Here, we explore how human-induced changes in plant community composition influence soil food webs...
2018: F1000Research
https://www.readbyqxmd.com/read/29331627/use-of-interactive-data-visualization-in-multi-objective-forest-planning
#14
Arto Haara, Jouni Pykäläinen, Anne Tolvanen, Mikko Kurttila
Common to multi-objective forest planning situations is that they all require comparisons, searches and evaluation among decision alternatives. Through these actions, the decision maker can learn from the information presented and thus make well-justified decisions. Interactive data visualization is an evolving approach that supports learning and decision making in multidimensional decision problems and planning processes. Data visualization contributes the formation of mental image data and this process is further boosted by allowing interaction with the data...
January 10, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29330607/river-continuity-restoration-and-diadromous-fishes-much-more-than-an-ecological-issue
#15
H Drouineau, C Carter, M Rambonilaza, G Beaufaron, G Bouleau, A Gassiat, P Lambert, S le Floch, S Tétard, E de Oliveira
Ecosystem fragmentation is a serious threat to biodiversity and one of the main challenges in ecosystem restoration. River continuity restoration (RCR) has often targeted diadromous fishes, a group of species supporting strong cultural and economic values and especially sensitive to river fragmentation. Yet it has frequently produced mixed results and diadromous fishes remain at very low levels of abundance. Against this background, this paper presents the main challenges for defining, evaluating and achieving effective RCR...
January 12, 2018: Environmental Management
https://www.readbyqxmd.com/read/29328512/economy-of-scale-third-partner-strengthens-a-keystone-ant-plant-mutualism
#16
Kirsten M Prior, Todd M Palmer
While foundation species can stabilize ecosystems at landscape scales, their ability to persist is often underlain by keystone interactions occurring at smaller scales. Acacia drepanolobium is a foundation tree, comprising >95% of woody cover in East African black-cotton savanna ecosystems. Its dominance is underlain by a keystone mutualistic interaction with several symbiotic ant species in which it provides housing (swollen thorns) and carbohydrate-rich nectar from extra-floral nectaries (EFN). In return, it gains protection from catastrophic damage from mega-herbivores...
January 12, 2018: Ecology
https://www.readbyqxmd.com/read/29321857/a-holistic-approach-to-determine-tree-structural-complexity-based-on-laser-scanning-data-and-fractal-analysis
#17
Dominik Seidel
The three-dimensional forest structure affects many ecosystem functions and services provided by forests. As forests are made of trees it seems reasonable to approach their structure by investigating individual tree structure. Based on three-dimensional point clouds from laser scanning, a newly developed holistic approach is presented that enables to calculate the box dimension as a measure of structural complexity of individual trees using fractal analysis. It was found that the box dimension of trees was significantly different among the tested species, among trees belonging to the same species but exposed to different growing conditions (at gap vs...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29320520/not-seeing-the-grass-for-the-trees-timber-plantations-and-agriculture-shrink-tropical-montane-grassland-by-two-thirds-over-four-decades-in-the-palani-hills-a-western-ghats-sky-island
#18
M Arasumani, Danish Khan, Arundhati Das, Ian Lockwood, Robert Stewart, Ravi A Kiran, M Muthukumar, Milind Bunyan, V V Robin
Tropical montane habitats, grasslands, in particular, merit urgent conservation attention owing to the disproportionate levels of endemic biodiversity they harbour, the ecosystem services they provide, and the fact that they are among the most threatened habitats globally. The Shola Sky Islands in the Western Ghats host a matrix of native forest-grassland matrix that has been planted over the last century, with exotic timber plantations. The popular discourse on the landscape change is that mainly forests have been lost to the timber plantations and recent court directives are to restore Shola forest trees...
2018: PloS One
https://www.readbyqxmd.com/read/29320475/warfare-and-wildlife-declines-in-africa-s-protected-areas
#19
Joshua H Daskin, Robert M Pringle
Large-mammal populations are ecological linchpins, and their worldwide decline and extinction disrupts many ecosystem functions and services. Reversal of this trend will require an understanding of the determinants of population decline, to enable more accurate predictions of when and where collapses will occur and to guide the development of effective conservation and restoration policies. Many correlates of large-mammal declines are known, including low reproductive rates, overhunting, and habitat destruction...
January 10, 2018: Nature
https://www.readbyqxmd.com/read/29311318/freshwater-salinization-syndrome-on-a-continental-scale
#20
Sujay S Kaushal, Gene E Likens, Michael L Pace, Ryan M Utz, Shahan Haq, Julia Gorman, Melissa Grese
Salt pollution and human-accelerated weathering are shifting the chemical composition of major ions in fresh water and increasing salinization and alkalinization across North America. We propose a concept, the freshwater salinization syndrome, which links salinization and alkalinization processes. This syndrome manifests as concurrent trends in specific conductance, pH, alkalinity, and base cations. Although individual trends can vary in strength, changes in salinization and alkalinization have affected 37% and 90%, respectively, of the drainage area of the contiguous United States over the past century...
January 8, 2018: Proceedings of the National Academy of Sciences of the United States of America
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