Ecological biomechanics of damage to macroalgae

Frontiers in Plant Science, Год журнала: 2022, Номер 13

Опубликована: Авг. 25, 2022

Macroalgae provide food and habitat to a diversity of organisms in marine systems, so structural damage breakage thallus tissue can have important ecological consequences for the composition dynamics communities. Common sources macroalgal include by hydrodynamic forces imposed ambient water currents waves, consumption herbivores, injuries due epibionts. Many species biomechanical designs that minimize these sources, such as flexibly reconfiguring into streamlined shapes flow, having either strong or extensible tissues are tough, chemical morphological defenses against herbivores If occurs, some macroalgae properties prevent cracks from propagating facilitate certain places, allowing remainder survive. In contrast mechanisms control, use aid dispersal, while others simply complete their reproduction prior seasonally-predictable periods (e.g., storm seasons). Once variety responses, including increasing strength, thickening support structures, altering shape. Thus, myriad strategies preventing, controlling, responding occur throughout lives.

Язык: Английский

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The impact of geographic isolation and host shifts on population divergence of the rare cicada Subpsaltria yangi

Molecular Phylogenetics and Evolution, Год журнала: 2024, Номер 199, С. 108146 - 108146

Опубликована: Июль 8, 2024

Язык: Английский

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Fronts divide diazotroph communities in the Southern Indian Ocean

FEMS Microbiology Ecology, Год журнала: 2024, Номер 100(8)

Опубликована: Июль 10, 2024

Dinitrogen (N2) fixation represents a key source of reactive nitrogen in marine ecosystems. While the process has been rather well-explored low latitudes Atlantic and Pacific Oceans, other higher latitude regions particularly Indian Ocean have chronically overlooked. Here, we characterize N2 diazotroph community composition across nutrient trace metals gradients spanning multifrontal system separating oligotrophic waters subtropical gyre from high chlorophyll Southern Ocean. We found sharp contrasting distribution groups frontal system. Notably, cyanobacterial diazotrophs dominated north fronts, driving rates (up to 13.96 nmol N l-1 d-1) with notable peaks near South African coast. fronts non-cyanobacterial prevailed without significant activity being detected. Our results provide new crucial insights into diazotrophy Ocean, which should contribute improved climate model parameterization enhanced constraints on global net primary productivity projections.

Язык: Английский

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The temperate marine Peruvian Province: How history accounts for its unusual biota

Ecology and Evolution, Год журнала: 2024, Номер 14(7)

Опубликована: Июль 1, 2024

Abstract The Peruvian Province, from 6° S in Peru to 42° Chile, is a highly productive coastal marine region whose biology and fossil record have long been studied separately but never integrated. To understand how past events conditions affected today's species composition interactions, we examined the role of extinction, colonization, geologic changes explain previously unrecognized peculiar features biota compare Province's history that other climatically similar temperate coasts. We synthesized all available data on benthic (or benthically feeding) biota, with emphasis fossilizable taxa, for interval Miocene (23–5.4 Ma) Pliocene (5.4–2.5 present. outline ecological guilds including primary producers, herbivores, predators, suspension‐feeders document patterns geographic restriction. identify twelve unusual attributes most which are result repeated episodes extinction. Several present during not represented province today, while groups such as kelps perhaps intertidal predatory sea stars relative newcomers. Guilds soft bottoms sheltered habitats were severely by whereas those hard colonists held their own diversity. Province has served biogeographic refuge, contrast coasts Australasia Argentina, where lineages no longer survive. loss since explains many present‐day peculiarities biota. province's its unique attributes. High productivity, rich Southern Hemisphere heritage, colonization north account characteristics

Язык: Английский

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Bimodal spore release heights in the water column enhance local retention and population connectivity of bull kelp, Nereocystis luetkeana

Ecology and Evolution, Год журнала: 2024, Номер 14(8)

Опубликована: Авг. 1, 2024

Abstract Dispersal of reproductive propagules determines recruitment patterns and connectivity among populations can influence how respond to major disturbance events. distributions depend on propagule release strategies. For instance, the bull kelp, Nereocystis luetkeana , (spores) from two heights in water column (“bimodal release”): at surface, directly tissues (sori) kelp's blades, near seafloor after sori abscise sink through column. N. is a foundation species that occurs central California Alaska experiencing unprecedented levels population declines its southern range limit. We know little dispersal distributions, which could recovery restoration. Here, we quantify bimodal spore affect outcomes based numerical model specifically designed for . The incorporates oceanographic conditions typical species' coastal kelp biological traits. With heights, 34% spores are predicted settle within 10 m parental alga 60% disperse beyond 100 m. As an annual species, facilitate local regeneration adults source forest while also supporting multiple forests broader metapopulations. To leverage this pattern restoration management, directing resources toward strategically located focal seed other ones amplify scale recovery.

Язык: Английский

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