Regional-scale effects override the influence of fine-scale landscape heterogeneity on rice arthropod communities

Dominik, Christophe; Seppelt, Ralf; Horgan, Finbarr G.; Márquez, Leonardo; Settele, Josef; Václavík, Tomáš

doi:10.1016/j.agee.2017.06.011

Cited by 32 publications

(47 citation statements)

References 51 publications

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“…SHDI, NP, COHESION and FRAC) were assigned as fixed effects. Although the main focus of our study was to test the effects of landscape heterogeneity, we included elevation as another predictor because this variable, being a proxy for regional-scale climatic conditions and land-use intensity, has been previously shown to determine the arthropod community composition in our study areas (Dominik et al, 2017). Climate data were obtained from the To account for trophic interactions, additional fixed effects were added to the full models when testing the responses of abundance of individual functional groups.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…The biodiversity present in rice landscapes in tropical Asia is often higher than in many natural ecosystems, as many of the species inhabiting rice fields are specialized, open grassland species (Dominik et al, 2017;Schoenly, Justo, Barrion, Harris, & Bottrell, 1998). Nevertheless, the intensification of rice cropping, in combination with the (over)use of insecticides, has led to disruptions in the interactions between herbivores and their natural enemies, resulting in often severe pest outbreaks (Heinrichs, Aquino, Chelliah, Valencia, & Reissig, 1982;Heinrichs & Mochida, 1984;Heong & Schoenly, 1998;Schoenly et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…In the tropical rice agroecosystems in the Philippines, regionalscale effects (e.g., the effects of elevation as a proxy for climate and other landscape factors) rather than fine-scale landscape heterogeneity explain much of the structure of the arthropod community (Dominik et al, 2017). However, the composition and spatial arrangement of habitat patches can also affect community structure at certain spatial scales (Pickett & Cadenasso, 1995;Roland & Taylor, 1997).…”

Section: Introductionmentioning

confidence: 99%

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Landscape composition, configuration, and trophic interactions shape arthropod communities in rice agroecosystems

Dominik

Seppelt

Horgan

et al. 2018

Journal of Applied Ecology

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Increasing landscape heterogeneity of agroecosystems can enhance natural enemy populations and promote biological control. However, little is known about the multiscale effects of landscape heterogeneity on arthropod communities in rice agroecosystems, especially in combination with trophic interactions. We examined for the first time how landscape heterogeneity, measured by four independent metrics of landscape composition and configuration at three spatial scales, affected species abundance and species richness of rice arthropods within four functional groups and the abundance of the most common species at 28 sites in the Philippines. We additionally examined the influence of trophic interactions among these functional groups. We found that both the compositional and configurational landscape heterogeneity in combination with trophic interactions determined the structure of rice‐arthropod communities. Herbivore abundance decreased with increasing landscape diversity. The abundance of parasitoids and species richness of both parasitoids and predators increased with the structural connectivity of rice bunds. Fragmentation of the rice landscape had a clear negative effect on most arthropod groups, except for highly mobile predatory arthropods. Abundance of common predators and detritivore species decreased with increasing complexity in the shape of rice patches. Trophic interactions, measured as the abundance of prey, outweighed the importance of landscape heterogeneity for predators. In contrast, parasitoids responded positively to configurational landscape heterogeneity but were unaffected by prey abundance. Synthesis and applications. Our research shows how landscape heterogeneity and trophic interactions have different effects on different functional groups. While predator abundance was solely driven by the availability of prey, all other functional groups in the rice‐arthropod community were significantly affected by the composition and configuration of surrounding landscape features. Landscape management aiming to improve biodiversity and biological control in rice agroecosystems should promote a diversity of land uses and habitat types within 100–300 m radii to reduce the presence of pests. Management practices should also focus on maintaining smaller rice patches and the structural connectivity of rice bunds to enhance populations of the natural enemies of rice pests. Future research should focus on the temporal and spatial manipulation of rice fields to maximize the effects of biological control.

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Section: Statistical Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Landscape composition, configuration, and trophic interactions shape arthropod communities in rice agroecosystems

Dominik

Seppelt

Horgan

et al. 2018

Journal of Applied Ecology

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“…The effectiveness of such natural enemies is influenced not only by natural (if anthropogenically modified) pressure factors, but also by management decisions including the choice of the rice varieties used and farming practices like the kinds and amounts of fertiliser and pesticides applied (Bengtsson 2015). Landscape management decisions like the choice of surrounding crops or the floristic composition of set-aside habitat, including the management of plants on rice bunds influence the functionality of the cropping system in general, and the effectiveness of the natural pest control in particular (Dominik et al 2017;Tylianakis et al 2007). As biodiversity is a decisive factor in this respect (Way and Heong 1994), LEGATO has monitored and inventoried the invertebrate fauna of rice fields and the responses of some of these, particularly egg parasitoids, to variations of herbivore populations.…”

Section: Biocontrol/pest Controlmentioning

confidence: 99%

“…LEGATO combines extensive field sampling of arthropod communities with the analysis of GIS and remote sensing data to examine the relationship between the metrics of landscape composition and configuration and the structure of arthropod community at 300 m buffers around each study site (Dominik et al 2017). Landscape complexity, in particular the proportion of rice and non-rice habitat, affects guild composition and species richness of the arthropod community but the responses vary between taxa, especially for the two main pest species the brown planthopper and the white-backed planthopper (Heong and Hardy 2009).…”

Section: Landscape Complexitymentioning

confidence: 99%

The LEGATO cross-disciplinary integrated ecosystem service research framework: an example of integrating research results from the analysis of global change impacts and the social, cultural and economic system dynamics of irrigated rice production

Spangenberg

Beaurepaire

Bergmeier

et al. 2017

Paddy Water Environ

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In a cross-disciplinary project (LEGATO) combining inter-and transdisciplinary methods, we quantify the dependency of rice-dominated socio-ecological systems on ecosystem functions (ESF) and the ecosystem services (ESS) the integrated system provides. In the collaboration of a large team including geo-and bioscientists, economists, political and cultural scientists, the mutual influences of the biological, climate and soil conditions of the agricultural area and its surrounding natural landscape have been analysed. One focus was on sociocultural and economic backgrounds, another on local as well as regional land use intensity and biodiversity, and the potential impacts of future climate and land use change. LEGATO analysed characteristic elements of three service strands defined by the Millennium Ecosystem Assessment (MA): (a) provisioning services: nutrient cycling and crop production; (b) regulating services: biocontrol and pollination; and (c) cultural services: cultural identity and aesthetics. However, in line with much of the current ESS literature, what the MA called supporting services is treated as ESF within LEGATO. As a core output, LEGATO developed generally applicable principles of ecological engineering (EE), suitable for application in the context of future climate and land use change. EE is an emerging discipline, concerned with the design, monitoring and construction of ecosystems and aims at developing strategies to optimise ecosystem services through exploiting natural regulation mechanisms instead of suppressing them. Along these lines LEGATO also aims to create the knowledge base for decision-making for sustainable land management and livelihoods, including the provision of the corresponding governance and management strategies, technologies and system solutions.

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Landscape heterogeneity filters functional traits of rice arthropods in tropical agroecosystems

Dominik

Seppelt

Horgan

et al. 2022

Ecological Applications

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Biological control services of agroecosystems depend on the functional diversity of species traits. However, the relationship between arthropod traits and landscape heterogeneity is still poorly understood, especially in tropical rice agroecosystems, which harbor a high diversity of often specialized species. We investigated how landscape heterogeneity, measured by three metrics of landscape composition and configuration, influenced body size, functional group composition, dispersal ability, and vertical distribution of rice arthropods in the Philippines. We found that landscape composition and configuration acted to filter arthropod traits in tropical rice agroecosystems. Landscape diversity and rice habitat fragmentation were the two main gradients influencing rice‐arthropod traits, indicating that different rice arthropods have distinct habitat requirements. Whereas small parasitoids and species mostly present in the rice canopy were favored in landscapes with high compositional heterogeneity, predators and medium‐sized species occupying the base of the rice plant, including planthoppers, mostly occurred in highly fragmented rice habitats. We demonstrate the importance of landscape heterogeneity as an ecological filter for rice arthropods, identifying how the different components of landscape heterogeneity selected for or against specific functional traits. However, the contrasting effects of landscape parameters on different groups of natural enemies indicate that not all beneficial rice arthropods can be promoted at the same time when using a single land management strategy. Increasing compositional heterogeneity in rice landscapes can promote parasitoids but may also negatively affect predators. Future research should focus on identifying trade‐offs between fragmented rice habitats and structurally diverse landscapes to maximize the presence of multiple groups of beneficial arthropods.

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Regional-scale effects override the influence of fine-scale landscape heterogeneity on rice arthropod communities

Cited by 32 publications

References 51 publications

Landscape composition, configuration, and trophic interactions shape arthropod communities in rice agroecosystems

Landscape composition, configuration, and trophic interactions shape arthropod communities in rice agroecosystems

The LEGATO cross-disciplinary integrated ecosystem service research framework: an example of integrating research results from the analysis of global change impacts and the social, cultural and economic system dynamics of irrigated rice production

Landscape heterogeneity filters functional traits of rice arthropods in tropical agroecosystems

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