Mechanistic simulations of kelp populations in a dynamic landscape of light, temperature, and winter storms DOI Creative Commons
Tim M. Szewczyk, Pippa J. Moore, Dan A. Smale

et al.

Ecological Modelling, Journal Year: 2023, Volume and Issue: 488, P. 110590 - 110590

Published: Dec. 6, 2023

Kelp forests are widely distributed across the coastal ocean, support high levels of biodiversity and primary productivity, underpin a range ecosystem services. Laminaria hyperborea is forest-forming kelp species in Northeast Atlantic that alters local environment, providing biogenic structure for diversity associated organisms. Populations strongly affected by light availability, temperature, storm-related disturbance. We constructed stage-based, two-season model L. populations along coast Great Britain Ireland to predict biomass depths, drawing on extensive surveys data from literature. Population dynamics were driven wave exposure, historic winter storm intensity, simulated interannual variation temperature depth-attenuated with density-dependent competition space. High was predicted shallow depths domain suitable substrate, extending deeper north west where penetration greater. Detritus production heavily skewed years, particularly at greater 10 % years comprising more than 50 detritus average below m depth. Annual fluctuations intensity produced opposing population oscillations ∼6-year period persisting up decade but diminishing sharply Interannual had minimal impact. Biomass most sensitive survival settlement rates, negligible sensitivity individual growth rates. This highlights need an improved understanding canopy subcanopy mortality, regarding increasingly frequent heatwaves. Estimations forest contributions carbon sequestration should consider variability among or risk underestimating potential value forests. Process-based simulations realistic spatiotemporal environmental valuable approach forecasting biotic responses extreme climate.

Language: Английский

Bacteria on the foundational kelp in kelp forest ecosystems: Insights from culturing, whole genome sequencing and metabolic assays DOI Creative Commons
Isaac T. Younker, N. Molnar, Kaylie Scorza

et al.

Environmental Microbiology Reports, Journal Year: 2024, Volume and Issue: 16(3)

Published: May 22, 2024

In coastal marine ecosystems, kelp forests serve as a vital habitat for numerous species and significantly influence local nutrient cycles. Bull kelp, or Nereocystis luetkeana, is foundational in the iconic of northeast Pacific Ocean harbours complex microbial community with potential implications health. Here, we report isolation functional characterisation 16 Nereocystis-associated bacterial species, comprising 13 Gammaproteobacteria, 2 Flavobacteriia 1 Actinomycetia. Genome analyses these isolates highlight metabolisms potentially beneficial to host, such B vitamin synthesis nitrogen retention. Assays revealed that kelp-associated bacteria thrive on amino acids found high concentrations ocean (glutamine asparagine), generating ammonium may facilitate host acquisition. Multiple have genes indicative interactions key elemental cycles ocean, including carbon, sulphur. We thus collection provide insight future study kelp-microbe interactions.

Language: Английский

Citations

4
Warming Seawater Temperature and Nutrient Depletion Alters Microbial Community Composition on a Foundational Canopy Kelp Species DOI Creative Commons
N. Molnar, Brooke L. Weigel, Robin J. Fales

et al.

Environmental Microbiology, Journal Year: 2025, Volume and Issue: 27(3)

Published: March 1, 2025

Warming seawater temperatures and low dissolved inorganic nitrogen (DIN) levels are environmental stressors that affect the health abundance of marine macroalgae their microbiomes. Nereocystis luetkeana, a canopy-forming species brown algae forms critical habitat along Pacific coast, has declined in regions impacted by these synergistic stressors. Little is known about how factors microbiome N. which could nutrient availability, vitamin production, stress response for host. We experimentally tested interactive effects three (13°C, 16°C, 21°C) crossed with abundant replete DIN on diversity composition blade-associated microbiomes from two spatially separated kelp host populations. hypothesised exposed to high would experience lowest diversity. Contrary our hypothesis, highest temperature treatment resulted largest increase microbial diversity, all treatments experienced decrease previously dominant taxa. Temperature had larger effect than cases. The disruption across temperatures, especially at temperature, suggests warming luetkeana extend microbiome.

Language: Английский

Citations

0
Concise review of the kelp genus Eisenia Areschoug DOI
José Ávila-Peltroche, Maria Lourdes Avalos Vásquez, J. Chirinos

et al.

Journal of Applied Phycology, Journal Year: 2024, Volume and Issue: 36(5), P. 2397 - 2416

Published: May 15, 2024

Language: Английский

Citations

0
Mechanistic simulations of kelp populations in a dynamic landscape of light, temperature, and winter storms DOI Creative Commons
Tim M. Szewczyk, Pippa J. Moore, Dan A. Smale

et al.

Ecological Modelling, Journal Year: 2023, Volume and Issue: 488, P. 110590 - 110590

Published: Dec. 6, 2023

Kelp forests are widely distributed across the coastal ocean, support high levels of biodiversity and primary productivity, underpin a range ecosystem services. Laminaria hyperborea is forest-forming kelp species in Northeast Atlantic that alters local environment, providing biogenic structure for diversity associated organisms. Populations strongly affected by light availability, temperature, storm-related disturbance. We constructed stage-based, two-season model L. populations along coast Great Britain Ireland to predict biomass depths, drawing on extensive surveys data from literature. Population dynamics were driven wave exposure, historic winter storm intensity, simulated interannual variation temperature depth-attenuated with density-dependent competition space. High was predicted shallow depths domain suitable substrate, extending deeper north west where penetration greater. Detritus production heavily skewed years, particularly at greater 10 % years comprising more than 50 detritus average below m depth. Annual fluctuations intensity produced opposing population oscillations ∼6-year period persisting up decade but diminishing sharply Interannual had minimal impact. Biomass most sensitive survival settlement rates, negligible sensitivity individual growth rates. This highlights need an improved understanding canopy subcanopy mortality, regarding increasingly frequent heatwaves. Estimations forest contributions carbon sequestration should consider variability among or risk underestimating potential value forests. Process-based simulations realistic spatiotemporal environmental valuable approach forecasting biotic responses extreme climate.

Language: Английский

Citations

0