A flexible method for estimating tip diversification rates across a range of speciation and extinction scenarios

Evolution, Год журнала: 2022, Номер 76(7), С. 1420 - 1433

Опубликована: Июнь 4, 2022

Estimates of diversification rates at the tips a phylogeny provide flexible approach for correlation analyses with multiple traits and to map in space while also avoiding uncertainty deep time rate reconstructions. Available methods tip estimation make different assumptions, thus their accuracy usually depends on characteristics underlying model generating tree. Here, we introduce MiSSE, trait‐free, state‐dependent speciation extinction that can be used estimate varying speciation, extinction, net diversification, turnover, fractions We compare inferred by MiSSE against similar demonstrate that, due certain model, error is generally low across broad range scenarios. alongside regular phylogenetic comparative trait‐related hypotheses, describe simple correction avoid pseudoreplication from sister independent contrasts. Finally, capabilities renewed focus classic methods, examine between plant height turnover eucalypts, species‐rich lineage flowering plants.

Язык: Английский

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Global patterns of taxonomic and phylogenetic diversity of flowering plants: Biodiversity hotspots and coldspots

Plant Diversity, Год журнала: 2023, Номер 45(3), С. 265 - 271

Опубликована: Фев. 4, 2023

Species diversity of angiosperms (flowering plants) varies greatly among regions. Geographic patterns variation in species are shaped by the interplay ecological and evolutionary processes. Here, using a comprehensive data set for regional angiosperm floras across world, we show geographic taxonomic (species) diversity, phylogenetic dispersion, deviation (i.e., after accounting diversity) world. Phylogenetic is strongly positively correlated with diversity; as result, world highly similar. Areas high located tropical regions whereas areas low temperate regions, particularly Eurasia North America, northern Africa. Similarly, dispersion is, general, higher lower However, pattern differs substantially from those dispersion. As hotspots coldspots identified based on incongruent deviations. Each these metrics may be considered when selecting to protected their biodiversity.

Язык: Английский

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Global patterns and climatic determinants of phylogenetic structure of regional fern floras

New Phytologist, Год журнала: 2023, Номер 239(1), С. 415 - 428

Опубликована: Март 30, 2023

Summary Knowledge of relationships between phylogenetic structure a biological assemblage and ecological factors that drive the variation among regions is crucial for understanding causes in taxonomic composition richness regions, but this knowledge lacking global flora ferns. Here, we fill critical gap. We divided globe into 392 geographic units on land, collated species lists ferns each unit, used different metrics (tip‐ vs basal‐weighted) reflecting evolutionary depths to quantify structure. then related six climatic variables as whole two groups (old clades polypods) histories across within continental region. found when old polypods were considered separately, temperature‐related explained more these than did precipitation‐related both groups. When analyses conducted pattern holds most cases. Climate extremes have stronger relationship with does climate seasonality. Climatic at deeper depths.

Язык: Английский

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Rapid in situ diversification rates in Rhamnaceae explain the parallel evolution of high diversity in temperate biomes from global to local scales

New Phytologist, Год журнала: 2024, Номер 241(4), С. 1851 - 1865

Опубликована: Янв. 16, 2024

Summary The macroevolutionary processes that have shaped biodiversity across the temperate realm remain poorly understood and may resulted from evolutionary dynamics related to diversification rates, dispersal colonization times, closely coupled with Cenozoic climate change. We integrated phylogenomic, environmental ordination, analyses for cosmopolitan angiosperm family Rhamnaceae disentangle contributed high species diversity within biomes. Our results show independent of environmentally similar but geographically separated regions mainly during Oligocene, consistent global expansion High global, regional, local was result in situ rather than immigration rates or accumulation time, except Southern China, which colonized much earlier other regions. relatively common lineage dispersals out hotspots highlight strong source‐sink distribution Rhamnaceae. proliferation environments since Oligocene provided ecological opportunity rapid realm. study illustrates importance establishment modern biomes spatial scales.

Язык: Английский

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On the relationship between species diversity and range size

Journal of Biogeography, Год журнала: 2022, Номер 49(11), С. 1911 - 1919

Опубликована: Сен. 9, 2022

Abstract Aim What factors may affect species range sizes remains a central question in ecology and biogeography. Particularly, whether how richness regulate average size largely elusive. Here, we explore the relationship between diversity at global extent discuss its implications significance for management. Location Worldwide. Taxon Plants various groups of animals. Methods We used published data on plant from around world synthesized related literature to assess richness–range relationships. paired t ‐tests spatial autoregressive models analyses. conducted series partial regressions partition variation ranges explained by independent variables (i.e. versus latitude, temperature or variability). Results A negative (richness) is nearly ubiquitous. In most cases, was better predictor than variability. Main conclusions The works well different taxonomic groups, regions, continents, both terrestrial marine biomes. High could imply stronger interactions such as competition which limit constituent species. universal thus has significant invasion biology conservation.

Язык: Английский

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Phytodiversity is associated with habitat heterogeneity from Eurasia to the Hengduan Mountains

New Phytologist, Год журнала: 2023, Номер 240(4), С. 1647 - 1658

Опубликована: Авг. 28, 2023

The geographic distribution of plant diversity matches the gradient habitat heterogeneity from lowlands to mountain regions. However, little is known about how much this relationship conserved across scales. Using World Checklist Vascular Plants and high-resolution biodiversity maps developed by species models, we investigated associations between richness at scales Eurasia Hengduan Mountains (HDM) in China. Habitat explains seed Eurasia, but 41/97 HDM families even higher than expected fitted statistical relationships. A index combining growing degree days, site water balance, bedrock type performs better based on single variables explaining richness. In HDM, association stronger larger Our findings suggest that high environmental provides suitable conditions for diversification lineages HDM. Nevertheless, alone cannot fully explain especially western complementary mechanisms, such as complex geological history region, may have contributed shaping exceptional hotspot.

Язык: Английский

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Global patterns of fern species diversity: An evaluation of fern data in GBIF

Plant Diversity, Год журнала: 2021, Номер 44(2), С. 135 - 140

Опубликована: Окт. 27, 2021

Despite that several studies have shown data derived from species lists generated distribution occurrence records in the Global Biodiversity Information Facility (GBIF) are not appropriate for those ecological and biogeographic require high sampling completeness, because GBIF generally very incomplete, Suissa et al. (2021) fern based on with 100 km × grid cells across world, used to determine diversity hotspots richness-climate relationships. We conduct an evaluation completeness of at grid-cell scale a larger spatial scale, whether relations composition richness climatic variables. show is low (<40%) most examined, such can substantially bias investigation geographic patterns identification hotspots. conclude incomplete wide range scales, completeness. present map showing global complete or nearly regional lists.

Язык: Английский

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Patterns of floristic and functional diversity in two treeline ecotone sites of Kashmir Himalaya

Environmental Monitoring and Assessment, Год журнала: 2022, Номер 194(6)

Опубликована: Май 11, 2022

Язык: Английский

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Spatial patterns and climatic drivers of phylogenetic structure for ferns along the longest elevational gradient in the world

Ecography, Год журнала: 2022, Номер 2023(1)

Опубликована: Ноя. 30, 2022

Many biodiversity hotspots are located in montane regions, thus, understanding the underlying mechanisms driving species assembly along elevational gradients is of major interest ecology and biogeography. Here, we assess spatial patterns climatic drivers, effects clade age, on phylogenetic structure ferns world's longest gradient central Himalaya. We used correlation regression analyses to relate metrics reflecting both shallow (tip‐weighted) deep (basal‐weighted) evolutionary histories ferns, their two groups different ages (polypods representing a young clade, all other old clades), fifty 100‐m vertical bands factors aspects conditions (mean climate, stressful climate seasonality). Variation partitioning analysis was determine relative importance each group structure. find that composition fern assemblages Himalayan Nepal shows strong signatures processes. In simplified way, species‐rich at mid‐elevations likely result recent radiations combination with low extinction rates, whereas species‐poor elevations composed numerous lineages limited radiations, those high few lineages, also signature radiations. Variables related temperature extremes tended play more important role than precipitation‐ seasonality‐related variables, respectively, Combining results angiosperms suggests there generally consistent processes apply plant (e.g. niche conservatism environmental filtering), but specific outcomes these vary elevation, age taxon.

Язык: Английский

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Self-clustered GAN for precipitation nowcasting

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Апрель 29, 2024

Abstract This paper proposes a novel GAN framework with self-clustering approach for precipitation nowcasting (ClusterCast). Previous studies have primarily captured the motion vector using only single latent space, making models difficult to adapt disparate space-time distribution of precipitation. Environmental factors (e.g., regional characteristics and scale) an impact on systems can cause non-stationary distribution. To tackle this problem, our key idea is train generator network predict future radar frames by learning sub-network that automatically labels types from generative model. The training process consists (i) clustering hierarchical features derived stem (ii) predicting according self-supervised labels, enabling heterogeneous representation. Additionally, we attempt ensemble forecast prescribes random perturbations improve performance. With flexibility representation learning, ClusterCast enables model learn more accurately. Results indicate method generates non-blurry preventing mode collapse, proposed demonstrates robustness across various scenarios. Extensive experiments demonstrate outperforms four benchmarks 2-h prediction basis mean squared error (MSE) 8.9% unseen datasets.

Язык: Английский

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