Search results for: A. Bohan

Items from 1 to 20 out of 35 results

article

Functional redundancy of weed seed predation is reduced by intensified agriculture

Eirini Daouti, Veronika Neidel, Benjamin Carbonne, Hana Vašková, more

Intensified agriculture, a driver of biodiversity loss, can diminish ecosystem functions and their stability. Biodiversity can increase functional redundancy and is expected to stabilize ecosystem functions. Few studies, however, have explored how agricultural intensity affects functional redundancy and its link with ecosystem function stability. Here, within a continental‐wide study, we assess how...

article

Microbial biomarkers of tree water status for next‐generation biomonitoring of forest ecosystems

Marine C. Cambon, Marine Trillat, Isabelle Lesur‐Kupin, Régis Burlett, more

Molecular Ecology > 32 > 22 > 5944 - 5958

Next‐generation biomonitoring proposes to combine machine‐learning algorithms with environmental DNA data to automate the monitoring of the Earth's major ecosystems. In the present study, we searched for molecular biomarkers of tree water status to develop next‐generation biomonitoring of forest ecosystems. Because phyllosphere microbial communities respond to both tree physiology and climate change,...

article

Direct and indirect effects of landscape and field management intensity on carabids through trophic resources and weeds

Benjamin Carbonne, David A. Bohan, Hana Foffová, Eirini Daouti, more

Journal of Applied Ecology > 59 > 1 > 176 - 187

Carabids are important biological control agents of weeds and other pests in agricultural fields. The carabid community is built upon direct and indirect ecological effects of landscape complexity, field management intensity and biotic components that in interaction make any prediction of community size and composition challenging. We analyse a large‐scale sample of 60 European cereal fields using...

article

Ecosystems monitoring powered by environmental genomics: A review of current strategies with an implementation roadmap

Tristan Cordier, Laura Alonso‐Sáez, Laure Apothéloz‐Perret‐Gentil, Eva Aylagas, more

Molecular Ecology > 30 > 13 > 2937 - 2958

A decade after environmental scientists integrated high‐throughput sequencing technologies in their toolbox, the genomics‐based monitoring of anthropogenic impacts on the biodiversity and functioning of ecosystems is yet to be implemented by regulatory frameworks. Despite the broadly acknowledged potential of environmental genomics to this end, technical limitations and conceptual issues still stand...

article

Microbial networks inferred from environmental DNA data for biomonitoring ecosystem change: Strengths and pitfalls

Didac Barroso‐Bergadà, Charlie Pauvert, Jessica Vallance, Laurent Delière, more

Molecular Ecology Resources > 21 > 3 > 762 - 780

Environmental DNA contains information on the species interaction networks that support ecosystem functions and services. Next‐generation biomonitoring proposes the use of this data to reconstruct ecological networks in real time and then compute network‐level properties to assess ecosystem change. We investigated the relevance of this proposal by assessing: (i) the replicability of DNA‐based networks...

article

Soil seedbank: Old methods for new challenges in agroecology?

Inès Mahé, Stéphane Cordeau, David A. Bohan, Damien Derrouch, more

Annals of Applied Biology > 178 > 1 > 23 - 38

The weed soil seedbank is of interest in agroecosystems as a major source of weed infestation in fields and as a reservoir of plant and seed‐feeder diversity. A seedbank is a characteristic of annual plants and has been the focus of numerous studies, as it reflects the past aboveground vegetation and is the reservoir of the future vegetation. Therefore, it potentially can be used to evaluate the past,...

article

Heteropaternal superfecundation frequently occurs in multiple‐bearing mob‐mated sheep

D. P. Berry, A. Bohan, A. C. O'Brien, F. C. Campion, more

Animal Genetics > 51 > 4 > 579 - 583

Heteropaternal superfecundation may be defined as the fertilisation of two or more ova during the same oestrus cycle as a result of more than one coital act from different males; this results in foetuses being born in the same litter of the same age but different paternity. Heteropaternal superfecundation is more likely to occur in poly‐ovulatory species like sheep; moreover, female sheep are often...

article

Weed seed availability, carabid intraspecific interference and their interaction drive weed seed consumption by carabid beetles

Benjamin Carbonne, David A. Bohan, Alice Charalabidis, Sandrine Petit

Agricultural and Forest Entomology > 21 > 4 > 396 - 406

Carabid beetles may play a role in the regulation of arable weeds, when seed predation is directly density‐dependent and consumption increases more than proportionally with seed density. We quantified the effect of seed and carabid density on consumption by two carabid species (Poecilus cupreus and Harpalus affinis) of the weed species Taraxacum officinale and Viola arvensis. For each pairing of...

article

Long‐Term Safety of Rituximab in Patients With Rheumatoid Arthritis: Results of a Five‐Year Observational Study

Kevin L. Winthrop, Kenneth Saag, Matthew D. Cascino, Jinglan Pei, more

Arthritis Care & Research > 71 > 8 > 993 - 1003

Objective To evaluate the long‐term safety of rituximab in an observational cohort of patients with rheumatoid arthritis (RA) who had an inadequate response to ≥1 anti–tumor necrosis factor therapy in the US (SUNSTONE [Study of the Safety of Rituxan in Patients With Rheumatoid Arthritis After an Inadequate Response to Previous Anti‐TNF Therapy] registry). Methods In this prospective, observational...

article

Molecular analysis indicates high levels of carabid weed seed consumption in cereal fields across Central Europe

Britta Frei, Yasemin Guenay, David A. Bohan, Michael Traugott, more

Journal of Pest Science > 2019 > 92 > 3 > 935-942

Carabid beetles are abundant in temperate agroecosystems and can play a pivotal role as biocontrol agents. While there is good knowledge regarding their effects on invertebrate pests in some systems, comparably little is known on the rate of seed feeding under field conditions. Molecular approaches are ideally suited for investigating carabid feeding interactions; to date, however, they have only...

article

The Shell Ocean Discovery XPRIZE Competition Impact on the Development of Ocean Mapping Possibilities

K. Zwolak, Y. Zarayskaya, R. A. Wigley, C. Lacerda, more

Annual of Navigation > 2018 > No. 25 > 125--136

The paper presents the impact that the XPRIZE Foundation competition, the Shell Ocean Discovery XPRIZE, has had on the development of current ocean mapping possibilities. A race for the prize has accelerated the development of innovative seabed mapping approaches that concentrated on new systems engineering or cutting-edge and innovative methods of existing equipment exploitation. The GEBCO - Nippon...

article

Relative effects of local management and landscape heterogeneity on weed richness, density, biomass and seed rain at the country-wide level, Great Britain

Audrey Alignier, Sandrine Petit, David A. Bohan

Agriculture, Ecosystems & Environment > 2017 > 246 > C > 12-20

Weed management is a critical issue as it is faced with a daunting set of challenges linked to crop productivity and farmland biodiversity. Developing new strategies for weed management requires a clear understanding of the relative role of local management and landscape heterogeneity on weeds. Yet few studies have investigated the combined effect of these factors on a variety of weed metrics that...

article

Do Social–Ecological Syndromes Predict Outcomes for Ecosystem Services? – a Reply to Bodin et al.

Laura E. Dee, Ross Thompson, François Massol, Angela Guerrero, more

Trends in Ecology & Evolution > 2017 > 32 > 8 > 549-552

article

Next-Generation Global Biomonitoring: Large-scale, Automated Reconstruction of Ecological Networks

David A. Bohan, Corinne Vacher, Alireza Tamaddoni-Nezhad, Alan Raybould, more

Trends in Ecology & Evolution > 2017 > 32 > 7 > 477-487

We foresee a new global-scale, ecological approach to biomonitoring emerging within the next decade that can detect ecosystem change accurately, cheaply, and generically. Next-generation sequencing of DNA sampled from the Earth’s environments would provide data for the relative abundance of operational taxonomic units or ecological functions. Machine-learning methods would then be used to reconstruct...

article

A life cycle assessment of the effect of intensification on the environmental impacts and resource use of grass-based sheep farming

D. O'Brien, A. Bohan, N. McHugh, L. Shalloo

Agricultural Systems > 2016 > 148 > C > 95-104

Intensification is a strategy that is reported to increase the productivity and environmental performance of livestock farms, but most life cycle assessments (LCA) of livestock (particularly sheep) only consider greenhouse gas (GHG) or carbon footprint (CF). The goal of our LCA study was to assess the effect of intensification on several measures of environmental impact and resource use for grass-based...

article

Description and validation of the Teagasc Lamb Production Model

A. Bohan, L. Shalloo, B. Malcolm, C.K.M. Ho, more

Agricultural Systems > 2016 > 148 > C > 124-134

A stochastic budgetary simulation model of a sheep farm was developed to investigate the effects of changes in lamb production systems on farm profitability. Model inputs included: land, labour, capital, animal numbers, as well as, input and output prices. Model outputs were simulated on a monthly basis and included: flock sales and purchases, net energy demand, grass supply and demand, lamb growth...

article

Local, neighbor and landscape effects on the abundance of weed seed-eating carabids in arable fields: A nationwide analysis

Sarah Labruyere, David A. Bohan, Luc Biju-Duval, Benoit Ricci, more

Basic and Applied Ecology > 2016 > 17 > 3 > 230-239

Recent studies suggest that weed seed predation by carabid beetles may partly substitute for chemical weed control in agriculture. Promoting this weed regulation service would require enhancement of the in-field abundance of seed-eating carabids, yet, the diversity of the habitat, trophic requirements and spatial scales of response of different species are complex and our understanding of how management...

article

Potential use of an arthropod database to support the non-target risk assessment and monitoring of transgenic plants

Jörg Romeis, Michael Meissle, Fernando Álvarez-Alfageme, Franz Bigler, more

Transgenic Research > 2014 > 23 > 6 > 995-1013

Worldwide, plants obtained through genetic modification are subject to a risk analysis and regulatory approval before they can enter the market. An area of concern addressed in environmental risk assessments is the potential of genetically modified (GM) plants to adversely affect non-target arthropods and the valued ecosystem services they provide. Environmental risk assessments are conducted case-by-case...

article

Do species population parameters and landscape characteristics affect the relationship between local population abundance and surrounding habitat amount?

Benoît Ricci, Pierre Franck, Muriel Valantin-Morison, David A. Bohan, more

Ecological Complexity > 2013 > 15 > Complete > 62-70

In landscape ecology, correlational approaches are typically used to analyse links between local population abundance, and the surrounding habitat amount to estimate biologically-relevant landscape size (extent) for managing endangered or pest populations. The direction, strength, and spatial extent of the correlations are then sometimes interpreted in terms of species population parameters. Here...

article

Intraguild predation in winter wheat: prey choice by a common epigeal carabid consuming spiders

Jeffrey S. Davey, Ian P. Vaughan, R. Andrew King, James R. Bell, more

Journal of Applied Ecology > 50 > 1 > 271 - 279

Predators can provide a valuable ecosystem service by suppressing crop pests. However, intraguild predation, where predators compete for the same prey resource whilst consuming each other, may destabilize population dynamics and increase the risk of pest outbreaks. Very little is known about intraguild predation in open fields or the strengths of trophic links between predators which may negatively...

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Keywords

CARABIDAE (4)
ECOSYSTEM SERVICES (4)
PTEROSTICHUS MELANARIUS (3)
SEED PREDATION (3)
AGROECOLOGY (2)
BIODIVERSITY (2)
CARABID (2)
ENVIRONMENTAL DNA (2)
FUNCTIONAL ECOLOGY (2)
HERBICIDE MANAGEMENT (2)
LAMB (2)
LANDSCAPE COMPOSITION (2)
METABARCODING (2)
MITOCHONDRIAL DNA (2)
SEEDBANK (2)
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AGROECOSYSTEMS (1)
ANIMAL PREY (1)
APHIDS (1)
ARABLE (1)
ARABLE PLANTS (1)
AUV/USV (1)
BATHYMETRY (1)
BIO-ECONOMIC MODEL (1)
BIOENERGY CROP (1)
BIOMONITORING (1)
BT MAIZE (1)
CANONICAL VARIATES ANALYSIS (1)
CARABID BEETLES (1)
CARABID DIVERSITY (1)
CARABIDS (1)
CASCADING EFFECT (1)
CELLULAR AUTOMATA (1)
CLIMATE CHANGE (1)
COMMUNITY ECOLOGY (1)
CONSPECIFIC AVOIDANCE (1)
CROP SEQUENCE (1)
CROP TYPE (1)
DIPTERA (1)
DISPERSAL (1)
DISTANCE TO FIELD MARGIN (1)
ECHOSOUNDER (1)
ECOLOGICAL MODELLING (1)
ECOLOGICAL NETWORKS (1)
ECOSYSTEM FUNCTION (1)
ECOSYSTEM MANAGEMENT (1)
ECOSYSTEM SERVICE (1)
ENVIRONMENTAL DNA DATA (1)
ENVIRONMENTAL RISK ASSESSMENT (1)
FARMLAND (1)
FIELD MANAGEMENT (1)
FIELD SIZE (1)
FOOD SECURITY (1)
FOOD WEB (1)
FOOD WEBS (1)
FUNCTIONAL BIODIVERSITY (1)
GOVERNANCE (1)
GRANIVORE (1)
GRANIVORY (1)
GRASSLAND (1)
GRAZING (1)
HABITAT QUALITY (1)
HARPALUS AFFINIS (1)
HIERARCHICAL MODELLING OF SPECIES COMMUNITIES (1)
HYDROGRAPHY (1)
IBM (1)
IMPLEMENTATION STRATEGY (1)
INDIVIDUAL-BASED MODEL (1)
INTRASPECIFIC INTERFERENCE COMPETITION (1)
INVERTEBRATE COMPOSITION (1)
LANDSCAPE COMPLEXITY (1)
LANDSCAPE CONFIGURATION (1)
LINYPHIID SPIDERS (1)
LIVESTOCK (1)
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LÉVY FLIGHT (1)
MACHINE‐LEARNING ALGORITHMS (1)
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MICROBIAL NETWORKS (1)
MODEL (1)
MODEL PREDICTION (1)
MOLECULAR BIOMARKERS (1)
MOLECULAR GUT CONTENT ANALYSIS (1)
MONTE CARLO SIMULATION (1)
MONTE CARLO SIMULATIONS (1)
MOTIFS (1)
MULTIPLE BIRTHS (1)
MULTIPLEX PCR (1)
NETWORK COMPARISON (1)
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NETWORKS (1)
NEXT‐GENERATION BIOMONITORING (1)
OCEAN MAPPING (1)
OMNIVORE (1)
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INFONA - science communication portal

Search results for: A. Bohan

Functional redundancy of weed seed predation is reduced by intensified agriculture

Microbial biomarkers of tree water status for next‐generation biomonitoring of forest ecosystems

Direct and indirect effects of landscape and field management intensity on carabids through trophic resources and weeds

Ecosystems monitoring powered by environmental genomics: A review of current strategies with an implementation roadmap

Microbial networks inferred from environmental DNA data for biomonitoring ecosystem change: Strengths and pitfalls

Soil seedbank: Old methods for new challenges in agroecology?

Heteropaternal superfecundation frequently occurs in multiple‐bearing mob‐mated sheep

Weed seed availability, carabid intraspecific interference and their interaction drive weed seed consumption by carabid beetles

Long‐Term Safety of Rituximab in Patients With Rheumatoid Arthritis: Results of a Five‐Year Observational Study

Molecular analysis indicates high levels of carabid weed seed consumption in cereal fields across Central Europe

The Shell Ocean Discovery XPRIZE Competition Impact on the Development of Ocean Mapping Possibilities

Relative effects of local management and landscape heterogeneity on weed richness, density, biomass and seed rain at the country-wide level, Great Britain

Do Social–Ecological Syndromes Predict Outcomes for Ecosystem Services? – a Reply to Bodin et al.

Next-Generation Global Biomonitoring: Large-scale, Automated Reconstruction of Ecological Networks

A life cycle assessment of the effect of intensification on the environmental impacts and resource use of grass-based sheep farming

Description and validation of the Teagasc Lamb Production Model

Local, neighbor and landscape effects on the abundance of weed seed-eating carabids in arable fields: A nationwide analysis

Potential use of an arthropod database to support the non-target risk assessment and monitoring of transgenic plants

Do species population parameters and landscape characteristics affect the relationship between local population abundance and surrounding habitat amount?

Intraguild predation in winter wheat: prey choice by a common epigeal carabid consuming spiders

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