On the relationship between spatial environmental variability, dispersion and biodiversity DOI Creative Commons

Giulia Bernardini,

G.G. Roberts, Mark D. Sutton

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Авг. 19, 2024

Abstract Aim We establish quantitative relationships between species richness and the rate of spatial change in controlled, digital, environments. use a simplified, first-principles, stochastic, evolutionary model which artificial organisms can evolve disperse. develop an understanding how environmental variability space influences it is affected by organisms’ ability to Time period At each time step experiment, organism reproduce sexually, disperse die. Each experiment run for 100,000 steps. The life span 15 Location uses artificial, landscape consisting uniform ( x, y ) grid cells, with single variable that changes sinusoidally x direction. Major taxa studied Organisms are defined 64-bit genome sexually. These digital designed mimic basic principles biological evolution. Methods starts organism, mutate producing offspring do all above environment. Monte Carlo experimentation used generate statistical insight into thousands replicate simulations. Results A strong correlation observed mean variable. This relationship holds true wide range dispersal abilities, but diminishes when very low. Main Conclusions predict variables (e.g. derivative elevation) driver real-world biodiversity where sufficient. Our results suggest plays important role determining responds gradients.

Язык: Английский

Escarpment evolution drives the diversification of the Madagascar flora DOI
Yi Liu, Yanyan Wang, Sean D. Willett

и другие.

Science, Год журнала: 2024, Номер 383(6683), С. 653 - 658

Опубликована: Фев. 8, 2024

Madagascar exhibits high endemic biodiversity that has evolved with sustained and stable rates of speciation over the past several tens millions years. The topography is dominated by a mountainous continental rift escarpment, highest plant diversity rarity found along steep, eastern side this geographic feature. Using process-explicit model, we show precipitation-driven erosion landward retreat high-relief creates transient habitat organization through multiple mechanisms, including catchment expansion, isolation highland remnants, formation topographic barriers. Habitat reconnection on million-year timescale serves as an allopatric pump creating observed biodiversity.

Язык: Английский

Процитировано

29
The rise of baobab trees in Madagascar DOI Creative Commons
Jun‐Nan Wan, Shengwei Wang, Andrew R. Leitch

и другие.

Nature, Год журнала: 2024, Номер 629(8014), С. 1091 - 1099

Опубликована: Май 15, 2024

The baobab trees (genus Adansonia) have attracted tremendous attention because of their striking shape and distinctive relationships with fauna

Язык: Английский

Процитировано

9
The macro-eco-evolutionary interplay between dispersal, competition and landscape structure in generating biodiversity DOI Creative Commons
Oskar Hagen, Duarte S. Viana, Thorsten Wiegand

и другие.

Philosophical Transactions of the Royal Society B Biological Sciences, Год журнала: 2024, Номер 379(1907)

Опубликована: Июнь 24, 2024

Theory links dispersal and diversity, predicting the highest diversity at intermediate levels. However, modulation of this relationship by macro-eco-evolutionary mechanisms competition within a landscape is still elusive. We examine interplay between dispersal, structure in shaping biodiversity over 5 million years dynamic archipelago landscape. model allopatric speciation, temperature niche, competition, trait evolution trade-offs competitive traits. Depending on abilities their interaction with structure, our exhibits two ‘connectivity regimes’, that foster speciation events among same group islands. Peaks (i.e. alpha, gamma phylogenetic), occurred dispersal; while shifted peaks towards higher values for each connectivity regime. This shift demonstrates how can boost through thermal specialists, ultimately limiting geographical ranges. Even simple landscape, multiple relationships emerged, all shaped similarly according to strength. Our findings remain valid as dispersal- competitive-related traits evolve trade-off; potentially leaving identifiable signatures, particularly when are imposed. Overall, we scrutinize convoluted species interactions processes, lasting imprints biodiversity. article part theme issue ‘Diversity-dependence dispersal: interspecific determine spatial dynamics’.

Язык: Английский

Процитировано

7
Evolution of Shoulder Type Escarpments Through Feedback Between Knickpoint and Windgap Migration DOI Creative Commons
Tianyue Qu, Eitan Shelef, Liran Goren

и другие.

Journal of Geophysical Research Earth Surface, Год журнала: 2025, Номер 130(1)

Опубликована: Янв. 1, 2025

Abstract Escarpments and cliffs (hereafter termed escarpments) form topographic barriers that influence the spatial patterns of climate biodiversity. The inherent extreme slope change across escarpment edge promotes retreat over time. Typically, escarpments are divided into arch‐ shoulder‐types. In arch‐type, drainage divide is located inland, knickpoints, where channels flow escarpment, can embay escarpment. shoulder‐type, aligns with edge, a setting expected to cause slow uniform retreat, preserving their integrity as through However, observations from around globe reveal shoulder‐type associated deep embayments (i.e., alcoves) destroy linear appearance front. Yet, processes produce sustain these remain largely unexplored. Embayments typically occur along reversed which were part antecedent used away but now toward it, often resulting in valley confined called windgap. Here, we hypothesize feedback between knickpoint windgap migration embayments, use analyses numerical simulations explore this hypothesis. Our analyses, focused on field sites Negev Desert, show be sustained hypothesized feedback, quantify sensitivity geomorphologic lithologic parameters. Results suggest may explain some global variability morphologies.

Язык: Английский

Процитировано

1
Complex stands in forested tropical landscapes harbor more endemic biodiversity and ecosystem functions DOI Creative Commons
Rindrasoa Rajaonarimalala, Yevgeniya Korol, Aristide Andrianarimisa

и другие.

Global Ecology and Conservation, Год журнала: 2024, Номер 54, С. e03154 - e03154

Опубликована: Авг. 23, 2024

Transformation of forests into agricultural lands threatens biodiversity and ecosystem functions globally. In the hotspot Madagascar, key along with highly endemic flora fauna are under threat. Comprehensive studies identifying determinants function losses lacking, no accounting for species richness across multiple taxa. We assess how plot-scale stand structural attributes (basal area, leaf area index, diameter diversity, tree richness) landscape-scale forest cover influence (species butterflies, ants, birds, reptiles, amphibians, herbaceous plants, multidiversity) (soil organic carbon, predation rate, acoustic multifunctionality) in tropical mosaic landscape northeastern Madagascar. Complexly structured stands a larger basal and/or higher promoted greater multidiversity (R² = 0.70), soil diversity. However, our models did not indicate significant explanatory variables 0.25) multifunctionality 0.43). Landscape-scale significantly favored bird richness. Our findings highlight that simplified structure, resulting from land-use change, substantially reduces this historically forested region. Conservation actions should aim at maintaining complex structure agroforests, while restoration interventions focus on re-building such structures.

Язык: Английский

Процитировано

3
Escarpment evolution in Madagascar unveils a pathway to understanding island biodiversity DOI Open Access
Jun‐Nan Wan, Shengwei Wang, Si‐Chong Chen

и другие.

Journal of Systematics and Evolution, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Язык: Английский

Процитировано

0
Migrating incision wave and the bottom-up drainage integration of the upper Yangtze River on the Tibetan Plateau before Pliocene times DOI
Yang Yu,

Xianyan Wang,

Zhengchen Li

и другие.

Palaeogeography Palaeoclimatology Palaeoecology, Год журнала: 2025, Номер unknown, С. 112810 - 112810

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

0
Geomorphological River Characteristics Explain Species Turnover in Amphibians, Reptiles and Lemurs in Madagascar's Eastern Rainforests DOI Creative Commons
Dominik Schüßler, Jaime R. Alvarado Bremer,

Martin Sauerwein

и другие.

Journal of Biogeography, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

ABSTRACT Aim The riverine barrier hypothesis is often tested as a driver for allopatric speciation. Rivers are usually treated static landscape features characterised by their width and elevation of headwaters. We aim to investigate the role rivers barriers using comprehensive database geomorphological characteristics assessing influence on species turnover rates. Location Eastern Madagascar. Taxon Sixty‐two taxa from 11 genera lemurs, amphibians reptiles. Methods compiled 21 variables 45 major rivers, estimated rates assemblages either side modelled river diversity. Topographic depressions, identified longitudinal profiles, heterogeneity were further analysed potential palaeoclimatic refugia alternative speciation drivers. Results A total 24 acted barriers. Three these had disproportionately high shared set distinct like maximum watershed, flow accumulation values at outlet an 800 m concavity profile. Other along main channel length coastal plain helped differentiate between with intermediate Species richness peaked in northeastern Madagascar, region highest abundance topographic depressions inferred palaeo‐wetlands. Main Conclusions Geomorphological effectively explained variations However, it remains uncertain whether functioned secondary dispersal thereby maintainers diversity, rather than primary drivers Additionally, we emphasise during oscillations, which associated depressions. Overall, integrating dynamic fluvial systems through space time into biogeographic studies offers valuable insights speciation, persistence taxa.

Язык: Английский

Процитировано

0
Record of paleo water divide locations reveals intermittent divide migration and links to paleoclimate proxies DOI Creative Commons
Elhanan Harel, Liran Goren,

Onn Crouvi

и другие.

Proceedings of the National Academy of Sciences, Год журнала: 2025, Номер 122(10)

Опубликована: Март 3, 2025

Drainage divide migration alters the geometry of drainage basins, influencing distribution water, erosion, sediments, and ecosystems across Earth's surface. The rate is governed by differences in erosion rates thus sensitive to spatiotemporal variations tectonics climate. However, established approaches for quantifying offer only indirect evidence motion provide averages. Consequently, transience cannot be resolved, hindering ability explore environmental changes that drive dynamics such potential transience. Here, we study a set datable terraces identified as markers paleo-divide locations, which direct paleo divide. location age reveal intermittent at timescales 104 105 y, with phases rapid migration-at more than twice average-which coincide documented regional paleoclimate fluctuations. These findings highlight nature over geomorphic its sensitivity climate changes, underscoring impact on planform evolution basins.

Язык: Английский

Процитировано

0
Pollen-Sensibilisierungsmuster von Patienten mit atopischer Dermatitis in Subsahara-Afrika und Mitteleuropa DOI
Danielle Fehr,

Muriel Rentschler,

Fandresena Arilala Sendrasoa

и другие.

Allergo Journal, Год журнала: 2025, Номер 34(2), С. 47 - 59

Опубликована: Март 1, 2025

Процитировано

0