Assembly of functional diversity in an oceanic island flora

Nature, Journal Year: 2023, Volume and Issue: 619(7970), P. 545 - 550

Published: July 12, 2023

Language: Английский

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Mapping functional diversity of canopy physiological traits using UAS imaging spectroscopy

Remote Sensing of Environment, Journal Year: 2024, Volume and Issue: 302, P. 113958 - 113958

Published: Jan. 5, 2024

Plant functional diversity (FD) is a component of biodiversity linking plant traits to ecosystem processes (e.g., photosynthesis) and services gross primary production). Development remote sensing capabilities monitor forest FD across various spatio-temporal scales critical, especially in view increasing global climate anthropogenic pressures. Here, we focus on investigating the capability unoccupied aerial systems (UAS), acquiring imaging spectroscopy data high spatial (pixel size ≤0.1 m) spectral (band-width < 5 nm between 400 1000 nm) resolutions, map two trait-based metrics, namely, richness divergence, open sclerophyll forests at plot-scale (<0.2 km2). An emerging scalable kernel-based trait probability density (TPD) approach was implemented compute spatially explicit metrics different areal extents pixel sizes through resampled products. Narrow-band indices were utilized as proxies selected traits, including photoprotective zeaxanthin-to-antheraxanthin transformation ratio (VAZ), foliar pigments chlorophylls anthocyanins (Cab Cant). The combination high-resolution imagery TPDs presents suitable alternative traditional need for taxonomic information alleviates pixel-based mixing issues known affect metrics. A moving kernel (6 × 6 applied UAS data, allowed capture fine medium-scale drivers within-crown complex branching variance, topography, sun aspect, speciation. For same size, computed from coarsened pseudo-airborne products 2 found be 57–68% that derived Functional divergence did not portray substantial differences even though this metric further emphasized complexity surveyed open-forest sites. have potential become an efficient tool monitoring linked with key sites, validation support large-scale but less detailed airborne satellite Finally, study highlights sensitivity variations scale, resolution, TPD parametrization suggesting more research needed standardize protocols quantification temporal scales.

Language: Английский

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A trait database and updated checklist for European subterranean spiders

Scientific Data, Journal Year: 2022, Volume and Issue: 9(1)

Published: May 26, 2022

Abstract Species traits are an essential currency in ecology, evolution, biogeography, and conservation biology. However, trait databases unavailable for most organisms, especially those living difficult-to-access habitats such as caves other subterranean ecosystems. We compiled expert-curated database spiders Europe using both literature data (including grey published many different languages) direct morphological measurements whenever specimens were available to us. started by updating the checklist of European spiders, now including 512 species across 20 families, which at least 192 have been found uniquely habitats. For each these species, we 64 traits. The encompasses measures, several related adaptation, ecological referring habitat preference, dispersal, feeding strategies. By making freely available, open up opportunities exploring research questions, from quantification functional dimensions adaptation study spatial patterns diversity caves.

Language: Английский

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A unifying framework for quantifying and comparing n‐dimensional hypervolumes

Methods in Ecology and Evolution, Journal Year: 2021, Volume and Issue: 12(10), P. 1953 - 1968

Published: July 6, 2021

Abstract The quantification of Hutchinson's n‐dimensional hypervolume has enabled substantial progress in community ecology, species niche analysis and beyond. However, most existing methods do not support a partitioning the different components hypervolume. Such is crucial to address ‘curse dimensionality’ measures interpret metrics on original axes instead principal components. Here, we propose use multivariate normal distributions for comparison hypervolumes introduce this as multivariate‐normal (MVNH) framework (R package available https://github.com/lvmuyang/MVNH ). provides parametric size dissimilarity hypervolumes, each which can be partitioned into biologically interpretable Specifically, determinant covariance matrix (i.e. generalized variance) MVNH measure total size, univariate variance correlation component (a dimensionality, i.e. effective number independent standardized by dimensions). Bhattacharyya distance (BD; function geometric mean two probability distributions) between MVNHs dissimilarity. BD partitions Mahalanobis (standardized Euclidean with correlated variables) centroids ratio difference. further divergences component. We empirical examples community‐ species‐level demonstrate new insights provided these metrics. show that newly proposed enables us quantify relative contributions connect analyses ecological drivers functional diversity environmental variation. Our approach overcomes several operational computational limitations popular nonparametric wide implications understanding diversity, evolution, shifts expansion during biotic invasions, etc.

Language: Английский

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Patterns of invertebrate functional diversity highlight the vulnerability of ecosystem services over a 45-year period

Current Biology, Journal Year: 2021, Volume and Issue: 31(20), P. 4627 - 4634.e3

Published: Aug. 18, 2021

Declines in invertebrate biodiversity1,2 pose a significant threat to key ecosystem services.3-5 Current analyses of biodiversity often focus on taxonomic diversity (e.g., species richness),6,7 which does not account for the functional role species. Functional species' morphological or behavioral traits is likely more relevant service delivery than diversity, as has been found be driver number services including decomposition and pollination.8-12 At present, we lack good understanding long-term large-scale changes limits our capacity determine vulnerability with ongoing change. Here derive trends over 45-year period across Great Britain supporting freshwater aquatic functions, pollination, natural pest control, agricultural pests (a disservice). Species functions showed synchronous collapse recovery diversity. In contrast, pollinators an increase but decline Pest control agents greater stability assessment period. We also that could appear stable show patterns recovery, despite composition among Our results suggest assemblages can considerable variability their structure time at national scale, provides important step determining

Language: Английский

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