Опубликована: Янв. 1, 2024
Язык: Английский
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
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
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
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
Science, Год журнала: 2025, Номер 387(6740), С. 1287 - 1291
Опубликована: Март 20, 2025
Biodiversity hotspots in Earth’s mountain ranges suggest a strong connection between topographic development and biological processes. However, it remains unclear whether high biodiversity is an evolutionary response to the rate of relief generation during building. Focusing on small mammals, such as rodents, we used coupled landscape-biological simulations show that increases with magnitude tectonic uplift. This relationship, visible depositional lowlands over millions years, underscores considerable role building shaping past present terrestrial biodiversity. Our results provide insights into influence changes processes, offering potential link formation paleodiversity records.
Язык: Английский
Процитировано
1
Journal of Systematics and Evolution, Год журнала: 2025, Номер unknown
Опубликована: Янв. 29, 2025
Язык: Английский
Процитировано
0
Palaeogeography Palaeoclimatology Palaeoecology, Год журнала: 2025, Номер unknown, С. 112810 - 112810
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
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
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
Allergo Journal, Год журнала: 2025, Номер 34(2), С. 47 - 59
Опубликована: Март 1, 2025
Процитировано
0