Foliar functional traits from imaging spectroscopy across biomes in eastern North America

New Phytologist, Journal Year: 2020, Volume and Issue: 228(2), P. 494 - 511

Published: May 28, 2020

Summary Foliar functional traits are widely used to characterize leaf and canopy properties that drive ecosystem processes infer physiological in Earth system models. Imaging spectroscopy provides great potential map foliar continuous variation diversity, but few studies have demonstrated consistent methods for mapping multiple across biomes. With airborne imaging data field from 19 sites, we developed trait models using partial least squares regression, mapped 26 seven NEON (National Ecological Observatory Network) ecoregions (domains) including temperate subtropical forests grasslands of eastern North America. Model validation accuracy varied among (normalized root mean squared error, 9.1–19.4%; coefficient determination, 0.28–0.82), with phenolic concentration, mass per area equivalent water thickness performing best domains. Across all maps, 90% vegetated pixels had reasonable values one trait, 28–81% provided high confidence concurrently. Maps their uncertainties US sites available download, being expanded the western United States tundra/boreal zone. These enable better understanding variations relationships over large areas, calibration models, assessment continental‐scale diversity.

Language: Английский

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The global significance of biodiversity science in China: an overview

National Science Review, Journal Year: 2021, Volume and Issue: unknown

Published: Feb. 19, 2021

Biodiversity science in China has seen rapid growth over recent decades, ranging from baseline biodiversity studies to understanding the processes behind evolution across dynamic regions such as Qinghai-Tibetan Plateau. We review research, including species catalogues; monitoring; origins, distributions, maintenance and threats biodiversity; biodiversity-related ecosystem function services; ecosystems' responses global change. Next, we identify priority topics offer suggestions priorities for future research China. These include (i) ecology biogeography of Plateau surrounding mountains, that subtropical tropical forests China; (ii) marine inland aquatic (iii) effective conservation management maintain synergies between socio-economic development fulfil China's vision becoming an ecological civilization. In addition, propose three strategies: translate advanced into practice conservation; strengthen capacity building application technologies, high-throughput sequencing, genomics remote sensing; expand international collaborations. Based on progress is well positioned become a leader near future.

Language: Английский

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Flux towers in the sky: global ecology from space

New Phytologist, Journal Year: 2019, Volume and Issue: 224(2), P. 570 - 584

Published: May 21, 2019

Global ecology - the study of interactions among Earth's ecosystems, land, atmosphere and oceans depends crucially on global observations: this paper focuses space-based observations terrestrial ecosystems. Early relied an extrapolation detailed site-level observations, using models increasing complexity. Modern has been enabled largely by vegetation indices (greenness) from operational imagery but current capabilities greatly expand scientific possibilities. New spacecraft in orbit allowed estimation gross carbon fluxes, photosynthesis, biomass burning, evapotranspiration biomass, to create virtual eddy covariance sites sky. Planned missions will reveal dimensions diversity life itself. These improve our understanding productivity storage, land use, cycle-climate feedback, diversity-productivity relationships enable improved climate forecasts. Advances remote sensing challenge ecologists relate information organised biome species new data arrayed pixels develop theory address previously unobserved scales.

Language: Английский

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The dimensionality and structure of species trait spaces

Ecology Letters, Journal Year: 2021, Volume and Issue: 24(9), P. 1988 - 2009

Published: May 20, 2021

Abstract Trait‐based ecology aims to understand the processes that generate overarching diversity of organismal traits and their influence on ecosystem functioning. Achieving this goal requires simplifying complexity in synthetic axes defining a trait space cluster species based while identifying those with unique combinations traits. However, so far, we know little about dimensionality, robustness omission structure these spaces. Here, propose unified framework synthesis across 30 datasets representing broad variety taxa, ecosystems spatial scales show common trade‐off between quality operationality appears three six dimensions. The is generally low but highly variable among datasets. We also highlight invariant scaling relationships, whatever complexity, number clusters, dominant total richness. When richness increases, saturates, whereas tend disproportionately pack richest cluster. Based results, some rules thumb build spaces estimate subsequent functional indices.

Language: Английский

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Human fingerprint on structural density of forests globally

Nature Sustainability, Journal Year: 2023, Volume and Issue: 6(4), P. 368 - 379

Published: Jan. 19, 2023

Language: Английский

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Reviewing the Spectral Variation Hypothesis: Twenty years in the tumultuous sea of biodiversity estimation by remote sensing

Ecological Informatics, Journal Year: 2024, Volume and Issue: 82, P. 102702 - 102702

Published: July 3, 2024

Twenty years ago, the Spectral Variation Hypothesis (SVH) was formulated as a means to link between different aspects of biodiversity and spatial patterns spectral data (e.g. reflectance) measured from optical remote sensing. This hypothesis initially assumed positive correlation variations computed raster in environment, which would turn correlate with species richness: following SVH, areas characterized by high heterogeneity (SH) should be related higher number available ecological niches, more likely host when combined. The past decade has witnessed major evolution progress both terms remotely sensed available, techniques analyze them, questions addressed. SVH been tested many contexts variety sensing data, this recent corpus highlighted potentials pitfalls. aim paper is review discuss methodological developments based on leading knowledge well conceptual uncertainties limitations for application estimate dimensions biodiversity. In particular, we systematically than 130 publications provide an overview ecosystems, characteristics (i.e., spatial, temporal resolution), metrics, tools, applications strength association SH metrics reported each study. conclusion, serves guideline researchers navigating complexities applying offering insights into current state future research possibilities field estimation data.

Language: Английский

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Synthesis and future research directions linking tree diversity to growth, survival, and damage in a global network of tree diversity experiments

Environmental and Experimental Botany, Journal Year: 2018, Volume and Issue: 152, P. 68 - 89

Published: Jan. 10, 2018

Language: Английский

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Assessing Vegetation Function with Imaging Spectroscopy

Surveys in Geophysics, Journal Year: 2019, Volume and Issue: 40(3), P. 489 - 513

Published: Feb. 15, 2019

Healthy vegetation function supports diverse biological communities and ecosystem processes, provides crops, forest products, forage, countless other benefits. Vegetation can be assessed by examining dynamic processes evaluating plant traits, which themselves are dynamic. Using both trait-based process-based approaches, spectroscopy assess at multiple scales using a variety of sensors platforms ranging from proximal to airborne satellite measurements. Since spectroscopic data defined the instruments available, along with their corresponding spatial, temporal spectral scales, since these may not always match those interest, consideration scale is necessary focus. For full understanding combined (multi-scale) sampling methods empirical theoretical approaches required, improved informatics.

Language: Английский

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Quantifying 3D structure and occlusion in dense tropical and temperate forests using close-range LiDAR

Agricultural and Forest Meteorology, Journal Year: 2019, Volume and Issue: 268, P. 249 - 257

Published: Jan. 29, 2019

Language: Английский

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Mapping foliar functional traits and their uncertainties across three years in a grassland experiment

Remote Sensing of Environment, Journal Year: 2018, Volume and Issue: 221, P. 405 - 416

Published: Nov. 30, 2018

Language: Английский

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