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Nahor O, Israel Á, Barger N, Rubin-Blum M, Luzzatto-Knaan T. Epiphytic microbiome associated with intertidal seaweeds in the Mediterranean Sea: comparative analysis of bacterial communities across seaweed phyla. Sci Rep 2024; 14:18631. [PMID: 39128929 PMCID: PMC11317491 DOI: 10.1038/s41598-024-69362-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Accepted: 08/05/2024] [Indexed: 08/13/2024] Open
Abstract
The complex interactions between epiphytic bacteria and marine macroalgae are still poorly understood, with limited knowledge about their community structure, interactions, and functions. This study focuses on comparing epiphytic prokaryotes community structure between three seaweed phyla; Chlorophyta, Rhodophyta, and Heterokontophyta in an easternmost rocky intertidal site of the Mediterranean Sea. By taking a snapshot approach and simultaneously collecting seaweed samples from the same habitat, we minimize environmental variations that could affect epiphytic bacterial assembly, thereby emphasizing host specificity. Through 16S rRNA gene amplicon sequencing, we identified that the microbial community composition was more similar within the same seaweed phylum host compared to seaweed host from other phyla. Furthermore, exclusive Amplicon Sequence Variants (ASVs) were identified for each algal phyla despite sharing higher taxonomic classifications across the other phyla. Analysis of niche breadth indices uncovers distinctive affinities and potential specialization among seaweed host phyla, with 39% of all ASVs identified as phylum specialists and 13% as generalists. Using taxonomy function prediction, we observed that the taxonomic variability does not significantly impact functional redundancy, suggesting resilience to disturbance. The study concludes that epiphytic bacteria composition is connected to host taxonomy, possibly influenced by shared morphological and chemical traits among genetically related hosts, implying a potential coevolutionary relationship between specific bacteria and their host seaweeds.
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Affiliation(s)
- Omri Nahor
- Department of Marine Biology, The Charney School of Marine Sciences, University of Haifa, Haifa, Israel
- Israel Oceanographic and Limnological Research, Tel Shikmona, Haifa, Israel
| | - Álvaro Israel
- Israel Oceanographic and Limnological Research, Tel Shikmona, Haifa, Israel
| | - Nataly Barger
- Department of Marine Biology, The Charney School of Marine Sciences, University of Haifa, Haifa, Israel
| | - Maxim Rubin-Blum
- Department of Marine Biology, The Charney School of Marine Sciences, University of Haifa, Haifa, Israel
- Israel Oceanographic and Limnological Research, Tel Shikmona, Haifa, Israel
| | - Tal Luzzatto-Knaan
- Department of Marine Biology, The Charney School of Marine Sciences, University of Haifa, Haifa, Israel.
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Fricke A, Bast F, Moreira-Saporiti A, Martins Bussanello G, Msuya FE, Teichberg M. Tropical bloom-forming mesoalgae Cladophoropsis sp. and Laurencia sp.-responses to ammonium enrichment and a simulated heatwave. JOURNAL OF PHYCOLOGY 2024; 60:554-573. [PMID: 38402562 DOI: 10.1111/jpy.13435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 01/19/2024] [Accepted: 01/24/2024] [Indexed: 02/26/2024]
Abstract
Algal blooms are increasing worldwide, driven by elevated nutrient inputs. However, it is still unknown how tropical benthic algae will respond to heatwaves, which are expected to be more frequent under global warming. In the present study, a multifactorial experiment was carried out to investigate the potential synergistic effects of increased ammonium inputs (25 μM, control at 2.5 μM) and a heatwave (31°C, control at 25°C) on the growth and physiology (e.g., ammonium uptake, nutrient assimilation, photosynthetic performance, and pigment concentrations) of two bloom-forming algal species, Cladophoropsis sp. and Laurencia sp. Both algae positively responded to elevated ammonium concentrations with higher growth and chlorophyll a and lutein concentrations. Increased temperature was generally a less important driver, interacting with elevated ammonium by decreasing the algaes' %N content and N:P ratios. Interestingly, this stress response was not captured by the photosynthetic yield (Fv/Fm) nor by the carbon assimilation (%C), which increased for both algae at higher temperatures. The negative effects of higher temperature were, however, buffered by nutrient inputs, showing an antagonistic response in the combined treatment for the concentration of VAZ (violaxanthin, antheraxanthin, zeaxanthin) and thalli growth. Ammonium uptake was initially higher for Cladophoropsis sp. and increased for Laurencia sp. over experimental time, showing an acclimation capacity even in a short time interval. This experiment shows that both algae benefited from increased ammonium pulses and were able to overcome the otherwise detrimental stress of increasingly emerging temperature anomalies, which provide them a strong competitive advantage and might support their further expansions in tropical marine systems.
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Affiliation(s)
- Anna Fricke
- WG Algae and Seagrass Ecology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
- Department Plant Quality and Food Security, Leibniz Institute of Vegetable and Ornamental Crops (IGZ), Großbeeren, Germany
| | - Felix Bast
- WG Algae and Seagrass Ecology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
- Department of Botany, Central University of Punjab, Ghudda VPO, Punjab, India
| | - Agustín Moreira-Saporiti
- WG Algae and Seagrass Ecology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
- Marine Biological Laboratory, The Ecosystems Center, Woods Hole, Massachusetts, USA
| | - Giovanni Martins Bussanello
- Florianópolis (UFSC), R. Eng. Agronômico Andrei Cristian Ferreira, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Flower E Msuya
- Zanzibar Seaweed Cluster Initiative (ZaSCI), Zanzibar, Tanzania
| | - Mirta Teichberg
- WG Algae and Seagrass Ecology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany
- Marine Biological Laboratory, The Ecosystems Center, Woods Hole, Massachusetts, USA
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Almeida-Saá AC, Umanzor S, Zertuche-González JA, Cruz-López R, Muñiz-Salazar R, Ferreira-Arrieta A, Bonet Melià P, García-Pantoja JA, Rangel-Mendoza LK, Vivanco-Bercovich M, Ruiz-Montoya L, Guzmán-Calderón JM, Sandoval-Gil JM. Bathymetric origin shapes the physiological responses of Pterygophora californica (Laminariales, Phaeophyceae) to deep marine heatwaves. JOURNAL OF PHYCOLOGY 2024; 60:483-502. [PMID: 38264946 DOI: 10.1111/jpy.13433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 12/19/2023] [Accepted: 01/09/2024] [Indexed: 01/25/2024]
Abstract
Kelp communities are experiencing exacerbated heat-related impacts from more intense, frequent, and deeper marine heatwaves (MHWs), imperiling the long-term survival of kelp forests in the climate change scenario. The occurrence of deep thermal anomalies is of critical importance, as elevated temperatures can impact kelp populations across their entire bathymetric range. This study evaluates the impact of MHWs on mature sporophytes of Pterygophora californica (walking kelp) from the bathymetric extremes (8-10 vs. 25-27 m) of a population situated in Baja California (Mexico). The location is near the southernmost point of the species's broad distribution (from Alaska to Mexico). The study investigated the ecophysiological responses (e.g., photobiology, nitrate uptake, oxidative stress) and growth of adult sporophytes through a two-phase experiment: warming simulating a MHW and a post-MHW phase without warming. Generally, the effects of warming differed depending on the bathymetric origin of the sporophytes. The MHW facilitated essential metabolic functions of deep-water sporophytes, including photosynthesis, and promoted their growth. In contrast, shallow-water sporophytes displayed metabolic stress, reduced growth, and oxidative damage. Upon the cessation of warming, certain responses, such as a decline in nitrate uptake and net productivity, became evident in shallow-water sporophytes, implying a delay in heat-stress response. This indicates that variation in temperatures can result in more prominent effects than warming alone. The greater heat tolerance of sporophytes in deeper waters shows convincing evidence that deep portions of P. californica populations have the potential to serve as refuges from the harmful impacts of MHWs on shallow reefs.
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Affiliation(s)
- Antonella C Almeida-Saá
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
| | - Schery Umanzor
- College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Juneau, Alaska, USA
| | | | - Ricardo Cruz-López
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
| | - Raquel Muñiz-Salazar
- Escuela de Ciencias de la Salud, Universidad Autónoma de Baja California, Ensenada, Mexico
| | | | - Paula Bonet Melià
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
| | | | - Laura K Rangel-Mendoza
- Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
| | - Manuel Vivanco-Bercovich
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
| | - Leonardo Ruiz-Montoya
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
| | | | - Jose Miguel Sandoval-Gil
- Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada, Mexico
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James C, Layton C, Hurd CL, Britton D. The endemic kelp Lessonia corrugata is being pushed above its thermal limits in an ocean warming hotspot. JOURNAL OF PHYCOLOGY 2024; 60:503-516. [PMID: 38426571 DOI: 10.1111/jpy.13434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/22/2024] [Accepted: 01/28/2024] [Indexed: 03/02/2024]
Abstract
Kelps are in global decline due to climate change, which includes ocean warming. To identify vulnerable species, we need to identify their tolerances to increasing temperatures and determine whether tolerances are altered by co-occurring drivers such as inorganic nutrient levels. This is particularly important for those species with restricted distributions, which may already be experiencing thermal stress. To identify thermal tolerance of the range-restricted kelp Lessonia corrugata, we conducted a laboratory experiment on juvenile sporophytes to measure performance (growth, photosynthesis) across its thermal range (4-22°C). We determined the upper thermal limit for growth and photosynthesis to be ~22-23°C, with a thermal optimum of ~16°C. To determine if elevated inorganic nitrogen availability could enhance thermal tolerance, we compared the performance of juveniles under low (4.5 μmol · d-1) and high (90 μmol · d-1) nitrate conditions at and above the thermal optimum (16-23.5°C). Nitrate enrichment did not enhance thermal performance at temperatures above the optimum but did lead to elevated growth rates at the thermal optimum. Our results indicate L. corrugata is likely to be extremely susceptible to moderate ocean warming and marine heatwaves. Peak sea surface temperatures during summer in eastern and northeastern Tasmania can reach up to 20-21°C, and climate projections suggest that L. corrugata's thermal limit will be regularly exceeded by 2050 as southeastern Australia is a global ocean-warming hotspot. By identifying the upper thermal limit of L. corrugata, we have taken a critical step in predicting the future of the species in a warming climate.
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Affiliation(s)
- Cody James
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
| | - Cayne Layton
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
| | - Catriona L Hurd
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
| | - Damon Britton
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
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Leathers T, King NG, Foggo A, Smale DA. Marine heatwave duration and intensity interact to reduce physiological tipping points of kelp species with contrasting thermal affinities. ANNALS OF BOTANY 2024; 133:51-60. [PMID: 37946547 PMCID: PMC10921831 DOI: 10.1093/aob/mcad172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND AND AIMS Marine heatwaves (MHWs) are widely recognized as pervasive drivers of ecosystem change, yet our understanding of how different MHW properties mediate ecological responses remains largely unexplored. Understanding MHW impacts on foundation species is particularly important, given their structural role in communities and ecosystems. METHODS We simulated a series of realistic MHWs with different levels of intensity (Control: 14 °C, Moderate: 18 °C, Extreme: 22 °C) and duration (14 or 28 d) and examined responses of two habitat-forming kelp species in the southwest UK. Here, Laminaria digitata reaches its trailing edge and is undergoing a range contraction, whereas Laminaria ochroleuca reaches its leading edge and is undergoing a range expansion. KEY RESULTS For both species, sub-lethal stress responses induced by moderate-intensity MHWs were exacerbated by longer duration. Extreme-intensity MHWs caused dramatic declines in growth and photosynthetic performance, and elevated bleaching, which were again exacerbated by longer MHW duration. Stress responses were most pronounced in L. ochroleuca, where almost complete tissue necrosis was observed by the end of the long-duration MHW. This was unexpected given the greater thermal safety margins assumed with leading edge populations. It is likely that prolonged exposure to sub-lethal thermal stress exceeded a physiological tipping point for L. ochroleuca, presumably due to depletion of internal reserves. CONCLUSIONS Overall, our study showed that exposure to MHW profiles projected to occur in the region in the coming decades can have significant deleterious effects on foundation kelp species, regardless of their thermal affinities and location within respective latitudinal ranges, which would probably have consequences for entire communities and ecosystems.
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Affiliation(s)
- Tayla Leathers
- Marine Biological Association of the United Kingdom, The Laboratory, Plymouth PL1 2PB, UK
| | - Nathan G King
- Marine Biological Association of the United Kingdom, The Laboratory, Plymouth PL1 2PB, UK
| | - Andy Foggo
- School of Biological and Marine Sciences, University of Plymouth, Plymouth PL4 8AA, UK
| | - Dan A Smale
- Marine Biological Association of the United Kingdom, The Laboratory, Plymouth PL1 2PB, UK
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Britton D, Layton C, Mundy CN, Brewer EA, Gaitán-Espitia JD, Beardall J, Raven JA, Hurd CL. Cool-edge populations of the kelp Ecklonia radiata under global ocean change scenarios: strong sensitivity to ocean warming but little effect of ocean acidification. Proc Biol Sci 2024; 291:20232253. [PMID: 38228502 DOI: 10.1098/rspb.2023.2253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 12/04/2023] [Indexed: 01/18/2024] Open
Abstract
Kelp forests are threatened by ocean warming, yet effects of co-occurring drivers such as CO2 are rarely considered when predicting their performance in the future. In Australia, the kelp Ecklonia radiata forms extensive forests across seawater temperatures of approximately 7-26°C. Cool-edge populations are typically considered more thermally tolerant than their warm-edge counterparts but this ignores the possibility of local adaptation. Moreover, it is unknown whether elevated CO2 can mitigate negative effects of warming. To identify whether elevated CO2 could improve thermal performance of a cool-edge population of E. radiata, we constructed thermal performance curves for growth and photosynthesis, under both current and elevated CO2 (approx. 400 and 1000 µatm). We then modelled annual performance under warming scenarios to highlight thermal susceptibility. Elevated CO2 had minimal effect on growth but increased photosynthesis around the thermal optimum. Thermal optima were approximately 16°C for growth and approximately 18°C for photosynthesis, and modelled performance indicated cool-edge populations may be vulnerable in the future. Our findings demonstrate that elevated CO2 is unlikely to offset negative effects of ocean warming on the kelp E. radiata and highlight the potential susceptibility of cool-edge populations to ocean warming.
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Affiliation(s)
- Damon Britton
- Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania 7004, Australia
| | - Cayne Layton
- Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania 7004, Australia
| | - Craig N Mundy
- Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania 7004, Australia
| | | | - Juan Diego Gaitán-Espitia
- School of Biological Sciences and the SWIRE Institute of Marine Sciences, The University of Hong-Kong, Hong Kong, People's Republic of China
| | - John Beardall
- School of Biological Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - John A Raven
- Division of Plant Science, University of Dundee at the James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK
- School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
- Climate Change Cluster, University of Technology, Sydney, Ultimo, New South Wales 2007, Australia
| | - Catriona L Hurd
- Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Hobart, Tasmania 7004, Australia
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Cai P, Xu L, Yang J, Tian C, Wu X, Wang C, Xiao B. Differences in survivability and toxic potential among Microcystis colonies of different sizes in sediment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:118916-118927. [PMID: 37919509 DOI: 10.1007/s11356-023-30753-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
Microcystis colonies have the ability to persist for extended periods in sediment and function as a "seed bank" for the succeeding summer bloom in water column. The colonial morphology and toxin production ability of Microcystis are important for their population maintenance and life history. However, it is unclear about the influence of the colony morphology and toxic potential of Microcystis colonies on their benthic process. To address this question, we classified field Microcystis samples into three groups based on their size (< 150 μm, 150-300 μm, and > 300 μm) and compared their survivability and toxic potential during culturing in sediment. The results showed that Microcystis colonies in sediments disappeared quickly at 25℃ but survived for long periods at 5℃. The survivability of smaller Microcystis colonies (< 300 μm) was significantly higher than that of larger ones (> 300 μm). The activities of catalase (CAT) were significantly increased in large colonies compared to small colonies at 15℃ and 25℃. Real-time PCR indicated that smaller colonies had higher proportion of potential toxic genotype, and Microcystis colonies cultured at 15℃ and 25℃ showed higher percentage of microcystin-producing genotype. These results indicate that Microcystis colonies survived longer at low temperature and that larger Microcystis colonies are more susceptible to oxidative stress in sediments. The difference of toxic potential of Microcystis colonies of different sizes in sediments may be related to their survival ability in sediments.
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Affiliation(s)
- Pei Cai
- Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lei Xu
- Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiaojiao Yang
- Dianchi Lake Ecosystem Observation and Research Station of Yunnan Province, Kunming Dianchi & Plateau Lakes Institute, Kunming, 650228, China
| | - Cuicui Tian
- Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xingqiang Wu
- Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Chunbo Wang
- Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Bangding Xiao
- Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
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Arnold CL, Bélanger D, Gagnon P. Growth Resilience of Subarctic Rhodoliths (Lithothamnion glaciale, Rhodophyta) to Chronic Low Sea Temperature and irradiance. JOURNAL OF PHYCOLOGY 2022; 58:251-266. [PMID: 34902157 DOI: 10.1111/jpy.13231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 10/27/2021] [Accepted: 11/17/2021] [Indexed: 06/14/2023]
Abstract
Rhodolith beds are pervasive marine biological systems in the subarctic North Atlantic. Limited knowledge about effects of temperature and irradiance on rhodolith growth limits the ability to anticipate the response of rhodolith beds to this ocean's chronic low, yet changing sea temperature and irradiance regimes. We carried out a 149-d laboratory experiment with Newfoundland Lithothamnion glaciale rhodoliths to test the predictions that growth (i) is inhibited at temperatures of ~0.5°C and (ii) resumes as temperature increases above 0.5°C, albeit at a higher rate under high than low irradiances. Rhodoliths were grown in experimental tanks at near-zero (~0.7°C) seawater temperatures during the first 85 d and at temperatures increasing naturally to ~6°C for the remaining 64 d. Rhodoliths in those tanks were exposed to either low (0.02 mol photons·m-2 ·d-1 ) or high (0.78 mol photons·m-2 ·d-1 ) irradiances during the entire experiment. Rhodoliths grew at a linear rate of ~281 μm·year-1 (0.77 μm·d-1 ) throughout the experiment under both irradiance treatments despite daily seawater temperature variation of up to 3°C. Near-zero temperatures of ~0.5 to 1.0°C did not inhibit rhodolith growth. Model selection showed that PAR-day (a cumulative irradiance index) was a better predictor of growth variation than Degree-day (a cumulative thermal index). Our findings extend to ~0.5°C the lower limit of the known temperature range (~1 to at least 16°C) over which growth in L. glaciale rhodoliths remains unaffected, while suggesting that the growth-irradiance relationship in low-light environments at temperatures below 6°C is less irradiance-driven than recently proposed.
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Affiliation(s)
- Cassidy L Arnold
- Department of Ocean Sciences, Ocean Sciences Centre, Memorial University of Newfoundland, St. John's, A1C 5S7, Newfoundland and Labrador, Canada
| | - David Bélanger
- Department of Biology, Memorial University of Newfoundland, St. John's, A1B 3X9, Newfoundland and Labrador, Canada
| | - Patrick Gagnon
- Department of Ocean Sciences, Ocean Sciences Centre, Memorial University of Newfoundland, St. John's, A1C 5S7, Newfoundland and Labrador, Canada
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Ravaglioli C, Benedetti-Cecchi L, Bertocci I, Maggi E, Uyà M, Bulleri F. The role of environmental conditions in regulating long-term dynamics of an invasive seaweed. Biol Invasions 2022. [DOI: 10.1007/s10530-021-02680-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AbstractThe mechanisms underpinning long-term dynamics and viability of invader populations in the receiving environment remain largely unknown. We tested the hypothesis that temporal variations in the abundance of a well-established invasive seaweed, Caulerpa cylindracea, in the NW Mediterranean, could be regulated by inter-annual fluctuations in environmental conditions. Abundance data of C. cylindracea, sampled repeatedly between 2005 and 2020 at the peak of its growing season (late summer/early fall), were related to interannual variations in seasonal seawater temperature, wind speed and rainfall recorded during different growth phases of the alga, in both subtidal and intertidal habitats. In both habitats, higher peak of C. cylindracea cover was associated with lower seawater temperature in spring and summer, when the seaweed exits the winter resting phase and starts a period of active growth. In addition, the peak abundance of subtidal C. cylindracea was positively associated with higher autumn wind speed intensity and spring daily total precipitation. Our study reveals the importance of seasonal and interannual variation of abiotic factors in shaping temporal patterns of abundance of C. cylindracea, in both subtidal and intertidal habitats. Identifying the factors underpinning invasive population temporal dynamics and viability is essential to predict the time and conditions under which an invader can thrive, and thus guide management strategies aimed to containing invasions under current and future climates.
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Gouvêa LP, Horta PA, Fragkopoulou E, Gurgel CFD, Peres LMC, Bastos E, Ramlov F, Burle G, Koerich G, Martins CDL, Serrão EA, Assis J. Phenotypic Plasticity in Sargassum Forests May Not Counteract Projected Biomass Losses Along a Broad Latitudinal Gradient. Ecosystems 2022. [DOI: 10.1007/s10021-022-00738-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Paix B, Potin P, Schires G, Le Poupon C, Misson B, Leblanc C, Culioli G, Briand JF. Synergistic effects of temperature and light affect the relationship between Taonia atomaria and its epibacterial community: a controlled conditions study. Environ Microbiol 2021; 23:6777-6797. [PMID: 34490980 DOI: 10.1111/1462-2920.15758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 09/03/2021] [Accepted: 09/03/2021] [Indexed: 11/29/2022]
Abstract
In the context of global warming, this study aimed to assess the effect of temperature and irradiance on the macroalgal Taonia atomaria holobiont dynamics. We developed an experimental set-up using aquaria supplied by natural seawater with three temperatures combined with three irradiances. The holobiont response was monitored over 14 days using a multi-omics approach coupling algal surface metabolomics and metabarcoding. Both temperature and irradiance appeared to shape the microbiota and the surface metabolome, but with a distinct temporality. Epibacterial community first changed according to temperature, and later in relation to irradiance, while the opposite occurred for the surface metabolome. An increased temperature revealed a decreasing richness of the epiphytic community together with an increase of several bacterial taxa. Irradiance changes appeared to quickly impact surface metabolites production linked with the algal host photosynthesis (e.g. mannitol, fucoxanthin, dimethylsulfoniopropionate), which was hypothesized to explain modifications of the structure of the epiphytic community. Algal host may also directly adapt its surface metabolome to changing temperature with time (e.g. lipids content) and also in response to changing microbiota (e.g. chemical defences). Finally, this study brought new insights highlighting complex direct and indirect responses of seaweeds and their associated microbiota under changing environments.
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Affiliation(s)
- Benoit Paix
- Université de Toulon, Laboratoire MAPIEM, La Garde, EA 4323, France
| | - Philippe Potin
- Sorbonne Université, CNRS, Integrative Biology of Marine Models (LBI2M), UMR 8227, Station Biologique de Roscoff (SBR), Roscoff, France
| | - Gaëtan Schires
- Sorbonne Université, CNRS, Center for Biological Marine Resources (CRBM), FR 2424, Station Biologique de Roscoff (SBR), Roscoff, France
| | - Christophe Le Poupon
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, La Garde, France
| | - Benjamin Misson
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, La Garde, France
| | - Catherine Leblanc
- Sorbonne Université, CNRS, Integrative Biology of Marine Models (LBI2M), UMR 8227, Station Biologique de Roscoff (SBR), Roscoff, France
| | - Gérald Culioli
- Université de Toulon, Laboratoire MAPIEM, La Garde, EA 4323, France
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Vranken S, Wernberg T, Scheben A, Severn-Ellis AA, Batley J, Bayer PE, Edwards D, Wheeler D, Coleman MA. Genotype-Environment mismatch of kelp forests under climate change. Mol Ecol 2021; 30:3730-3746. [PMID: 34018645 DOI: 10.1111/mec.15993] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 01/23/2023]
Abstract
Climate change is increasingly impacting ecosystems globally. Understanding adaptive genetic diversity and whether it will keep pace with projected climatic change is necessary to assess species' vulnerability and design efficient mitigation strategies such as assisted adaptation. Kelp forests are the foundations of temperate reefs globally but are declining in many regions due to climate stress. A lack of knowledge of kelp's adaptive genetic diversity hinders assessment of vulnerability under extant and future climates. Using 4245 single nucleotide polymorphisms (SNPs), we characterized patterns of neutral and putative adaptive genetic diversity for the dominant kelp in the southern hemisphere (Ecklonia radiata) from ~1000 km of coastline off Western Australia. Strong population structure and isolation-by-distance was underpinned by significant signatures of selection related to temperature and light. Gradient forest analysis of temperature-linked SNPs under selection revealed a strong association with mean annual temperature range, suggesting adaptation to local thermal environments. Critically, modelling revealed that predicted climate-mediated temperature changes will probably result in high genomic vulnerability via a mismatch between current and future predicted genotype-environment relationships such that kelp forests off Western Australia will need to significantly adapt to keep pace with projected climate change. Proactive management techniques such as assisted adaptation to boost resilience may be required to secure the future of these kelp forests and the immense ecological and economic values they support.
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Affiliation(s)
- Sofie Vranken
- UWA Oceans Institute, Crawley, WA, Australia
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
| | - Thomas Wernberg
- UWA Oceans Institute, Crawley, WA, Australia
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
- Institute of Marine Research, His, Norway
| | - Armin Scheben
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
- Simons Center for Quantitative Biology, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, NY, USA
| | | | - Jacqueline Batley
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
| | - Philipp Emanuel Bayer
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
| | - David Edwards
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
| | - David Wheeler
- New South Wales Department of Primary Industries, Orange Agricultural Institute, Orange, NSW, Australia
| | - Melinda Ann Coleman
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
- New South Wales Fisheries, National Marine Science Centre, Coffs Harbour, NSW, Australia
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
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13
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Acclimation potential and biochemical response of four temperate macroalgae to light and future seasonal temperature scenarios. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102190] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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14
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Román M, Román S, Vázquez E, Troncoso J, Olabarria C. Heatwaves during low tide are critical for the physiological performance of intertidal macroalgae under global warming scenarios. Sci Rep 2020; 10:21408. [PMID: 33293562 PMCID: PMC7722886 DOI: 10.1038/s41598-020-78526-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 11/26/2020] [Indexed: 11/21/2022] Open
Abstract
The abundance and distribution of intertidal canopy-forming macroalgae are threatened by the increase in sea surface temperature and in the frequency and intensity of heatwaves caused by global warming. This study evaluated the physiological response of predominant intertidal macroalgae in the NW Iberian Peninsula (Bifurcaria bifurcata, Cystoseira tamariscifolia and Codium tomentosum) to increased seawater temperature during immersion and increased air temperatures during consecutive emersion cycles. We combined field mensuration and laboratory experiments in which we measured mortality, growth, maximum quantum yield and C:N content of the macroalgae. Air temperature was a critical factor in determining physiological responses and survivorship of all species, whereas high seawater temperature had sublethal effects. Cystoseira tamariscifolia suffered the greatest decreases in Fv/Fm, growth and the highest mortality under higher air temperatures, whereas C. tomentosum was the most resistant and resilient species. Two consecutive cycles of emersion under atmospheric heatwaves caused cumulative stress in all three macroalgae, affecting the physiological performance and increasing the mortality. The potential expansion of the warm-temperate species B. bifurcata, C. tamariscifolia and C. tomentosum in the NW Iberian Peninsula in response to increasing seawater temperature may be affected by the impact of increased air temperature, especially in a region where the incidence of atmospheric heatwaves is expected to increase.
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Affiliation(s)
- Marta Román
- Departamento de Ecoloxía E Bioloxía Animal. Facultade de Ciencias Do Mar, Universidade de Vigo, Campus Lagoas-Marcosende, s/n, 36310, Vigo, Pontevedra, Spain.
- CIM. Grupo de Ecoloxía Costeira, Edificio CC Experimentais, Universidade de Vigo, Campus de Vigo, As Lagoas, Marcosende, 36310, Vigo, Spain.
| | - Salvador Román
- Departamento de Ecoloxía E Bioloxía Animal. Facultade de Ciencias Do Mar, Universidade de Vigo, Campus Lagoas-Marcosende, s/n, 36310, Vigo, Pontevedra, Spain
- CIM. Grupo de Ecoloxía Costeira, Edificio CC Experimentais, Universidade de Vigo, Campus de Vigo, As Lagoas, Marcosende, 36310, Vigo, Spain
| | - Elsa Vázquez
- Departamento de Ecoloxía E Bioloxía Animal. Facultade de Ciencias Do Mar, Universidade de Vigo, Campus Lagoas-Marcosende, s/n, 36310, Vigo, Pontevedra, Spain
- CIM. Grupo de Ecoloxía Costeira, Edificio CC Experimentais, Universidade de Vigo, Campus de Vigo, As Lagoas, Marcosende, 36310, Vigo, Spain
| | - Jesús Troncoso
- Departamento de Ecoloxía E Bioloxía Animal. Facultade de Ciencias Do Mar, Universidade de Vigo, Campus Lagoas-Marcosende, s/n, 36310, Vigo, Pontevedra, Spain
- CIM. Grupo de Ecoloxía Costeira, Edificio CC Experimentais, Universidade de Vigo, Campus de Vigo, As Lagoas, Marcosende, 36310, Vigo, Spain
| | - Celia Olabarria
- Departamento de Ecoloxía E Bioloxía Animal. Facultade de Ciencias Do Mar, Universidade de Vigo, Campus Lagoas-Marcosende, s/n, 36310, Vigo, Pontevedra, Spain
- CIM. Grupo de Ecoloxía Costeira, Edificio CC Experimentais, Universidade de Vigo, Campus de Vigo, As Lagoas, Marcosende, 36310, Vigo, Spain
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15
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Atkinson J, King NG, Wilmes SB, Moore PJ. Summer and Winter Marine Heatwaves Favor an Invasive Over Native Seaweeds. JOURNAL OF PHYCOLOGY 2020; 56:1591-1600. [PMID: 32679619 DOI: 10.1111/jpy.13051] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
Marine heatwaves (MHWs) are emerging as forceful agents of ecosystem change and are increasing in frequency, duration, and intensity with climate change. During MHWs, physiological thresholds of native species may be exceeded while the performance of invasive species with warm affinities may be enhanced. As a consequence, MHWs could significantly alter an ecosystem's invasive dynamics, but such interactions are poorly understood. Following a 10-d acclimation period, we investigated the physiological resistance and resilience of an intertidal rock pool assemblage invaded by the seaweed Sargassum muticum to realistic 14-d marine heatwave scenarios (+1.5°C, +2.0°C, +3.5°C) followed by a 14-d recovery period. We conducted mesocosm experiments in both summer and winter to investigate temporal variability of MHWs. MHW treatments had clear negative impacts on native seaweeds (Fucus serratus and Chondrus crispus) while enhancing the performance of S. muticum. This pattern was consistent across season indicating that acclimation to cooler ambient temperatures results in winter MHWs having significant impacts on native species. As climate warming advances, this may ultimately lead to changes in competitive interactions and potentially exclusion of native species, while invasive species may proliferate and become more conspicuous within temperate rocky shore environments.
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Affiliation(s)
- James Atkinson
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3DA, UK
| | - Nathan G King
- School of Ocean Sciences, Bangor University, Menai Bridge, LL59 5AB, UK
| | - Sophie B Wilmes
- School of Ocean Sciences, Bangor University, Menai Bridge, LL59 5AB, UK
| | - Pippa J Moore
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3DA, UK
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16
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Véliz K, Chandía N, Bischof K, Thiel M. Geographic Variation of UV Stress Tolerance in Red Seaweeds Does Not Scale with Latitude Along the SE Pacific Coast. JOURNAL OF PHYCOLOGY 2020; 56:1090-1102. [PMID: 32348548 DOI: 10.1111/jpy.13009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
Geographic variation of phenotypic traits affects the capacity of species to withstand and adapt to environmental stress. Here, we examined how geographic origin influences UV stress tolerance of the red seaweeds Chondracanthus chamissoi and Gelidium lingulatum distributed along the South-East Pacific coast between 20° S and 42° S. Seaweeds from six (C. chamissoi) and five (G. lingulatum) populations were grown under common-garden conditions and then exposed to consecutive UV stress events and essential biological traits (e.g., growth, photosynthetic responses, antioxidant capacity, and UV-absorbing compounds) were analyzed. In C. chamissoi, a strong UV sensitivity occurred in populations from mid-latitudes (27° S and 29° S) where the lowest recovery of maximum quantum yield (Fv /Fm ; between 32.3% and 66.8% of control) and growth rate were observed. Likewise, the lowest amount of mycosporine-like amino acids (MAAs) and a significant decrease in phycobilins were registered in these populations. In G. lingulatum, recovery of Fv /Fm ranged from 82.0% to 97.7% of control, and antioxidant activity, carotenoid, and MAA contents were positively influenced by UV exposure. The multivariate analysis indicated a significant influence of PAR, cloud cover, and UV index on physiological traits, depending on species. The ecotypic differentiation index (EDI) indicated a higher phenotypic variation in C. chamissoi (EDI = 0.10) than G. lingulatum (EDI = 0.03). This study shows that the spatial distribution of UV stress tolerance in the studied seaweeds does not follow linear latitudinal or central-edge gradients. Instead, among-site variability of solar intensities driven by specific climatic conditions seems to act as driver of phenotypic variation.
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Affiliation(s)
- Karina Véliz
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
| | - Nancy Chandía
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
| | - Kai Bischof
- Marine Botany, University of Bremen, 28359, Bremen, Germany
| | - Martin Thiel
- Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile
- Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Av. Ossandon 877, Coquimbo, Chile
- Millennium Nucleus Ecology and Sustainable Management of Oceanic Island (ESMOI), Coquimbo, Chile
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17
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Britton D, Schmid M, Noisette F, Havenhand JN, Paine ER, McGraw CM, Revill AT, Virtue P, Nichols PD, Mundy CN, Hurd CL. Adjustments in fatty acid composition is a mechanism that can explain resilience to marine heatwaves and future ocean conditions in the habitat-forming seaweed Phyllospora comosa (Labillardière) C.Agardh. GLOBAL CHANGE BIOLOGY 2020; 26:3512-3524. [PMID: 32105368 DOI: 10.1111/gcb.15052] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 02/10/2020] [Indexed: 06/10/2023]
Abstract
Marine heatwaves are extreme events that can have profound and lasting impacts on marine species. Field observations have shown seaweeds to be highly susceptible to marine heatwaves, but the physiological drivers of this susceptibility are poorly understood. Furthermore, the effects of marine heatwaves in conjunction with ocean warming and acidification are yet to be investigated. To address this knowledge gap, we conducted a laboratory culture experiment in which we tested the growth and physiological responses of Phyllospora comosa juveniles from the southern extent of its range (43-31°S) to marine heatwaves, ocean warming and acidification. We used a 'collapsed factorial design' in which marine heatwaves were superimposed on current (today's pH and temperature) and future (pH and temperature projected by 2100) ocean conditions. Responses were tested both during the heatwaves, and after a 7-day recovery period. Heatwaves reduced net photosynthetic rates in both current and future conditions, while respiration rates were elevated under heatwaves in the current conditions only. Following the recovery period, there was little evidence of heatwaves having lasting negative effects on growth, photosynthesis or respiration. Exposure to heatwaves, future ocean conditions or both caused an increase in the degree of saturation of fatty acids. This adjustment may have counteracted negative effects of elevated temperatures by decreasing membrane fluidity, which increases at higher temperatures. Furthermore, P. comosa appeared to down-regulate the energetically expensive carbon dioxide concentrating mechanism in the future conditions with a reduction in δ13 C values detected in these treatments. Any saved energy arising from this down-regulation was not invested in growth and was likely invested in the adjustment of fatty acid composition. This adjustment is a mechanism by which P. comosa and other seaweeds may tolerate the negative effects of ocean warming and marine heatwaves through benefits arising from ocean acidification.
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Affiliation(s)
- Damon Britton
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
| | - Matthias Schmid
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
| | - Fanny Noisette
- Institut des Sciences de la Mer, Université du Québec à Rimouski, Rimouski, QC, Canada
| | - Jonathan N Havenhand
- Department of Marine Sciences, Tjärnö Marine Laboratory, University of Gothenburg, Strömstad, Sweden
| | - Ellie R Paine
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
| | - Christina M McGraw
- Department of Chemistry, NIWA/University of Otago Research Centre for Oceanography, University of Otago, Dunedin, New Zealand
| | | | - Patti Virtue
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
- CSIRO Oceans and Atmosphere, Hobart, Tas., Australia
- Antarctic Climate and Ecosystems, Cooperative Research Centre, Hobart, Tas., Australia
| | - Peter D Nichols
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
- CSIRO Oceans and Atmosphere, Hobart, Tas., Australia
| | - Craig N Mundy
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
| | - Catriona L Hurd
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
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18
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Hereward HFR, King NG, Smale DA. Intra-Annual Variability in Responses of a Canopy Forming Kelp to Cumulative Low Tide Heat Stress: Implications for Populations at the Trailing Range Edge. JOURNAL OF PHYCOLOGY 2020; 56:146-158. [PMID: 31571218 DOI: 10.1111/jpy.12927] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 09/11/2019] [Indexed: 06/10/2023]
Abstract
Anthropogenic climate change is driving the redistribution of species at a global scale. For marine species, populations at trailing edges often live very close to their upper thermal limits and, as such, poleward range contractions are one of the most pervasive effects of ongoing and predicted warming. However, the mechanics of processes driving such contractions are poorly understood. Here, we examined the response of the habitat forming kelp, Laminaria digitata, to realistic terrestrial heatwave simulations akin to those experienced by intertidal populations persisting at the trailing range edge in the northeast Atlantic (SW England). We conducted experiments in both spring and autumn to determine temporal variability in the effects of heatwaves. In spring, heatwave scenarios caused minimal stress to L. digitata but in autumn all scenarios tested resulted in tissue being nonviable by the end of each assay. The effects of heatwave scenarios were only apparent after consecutive exposures, indicating erosion of resilience over time. Monthly field surveys corroborated experimental evidence as the prevalence of bleaching (an indication of physiological stress and tissue damage) in natural populations was greatest in autumn and early winter. Overall, our data showed that L. digitata populations in SW England persist close to their upper physiological limits for emersion stress in autumn. As the intensity of extreme warming events is likely to increase with anthropogenic climate change, thermal conditions experienced during periods of emersion will soon exceed physiological thresholds and will likely induce widespread mortality and consequent changes at the population level.
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Affiliation(s)
- Hannah F R Hereward
- Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK
- School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth, PL4 8AA, UK
| | - Nathan G King
- School of Ocean Sciences, Bangor University, Menai Bridge, LL59 5AB, UK
| | - Dan A Smale
- Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK
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19
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Li H, Monteiro C, Heinrich S, Bartsch I, Valentin K, Harms L, Glöckner G, Corre E, Bischof K. Responses of the kelp Saccharina latissima (Phaeophyceae) to the warming Arctic: from physiology to transcriptomics. PHYSIOLOGIA PLANTARUM 2020; 168:5-26. [PMID: 31267544 DOI: 10.1111/ppl.13009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/31/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
The Arctic region is currently facing substantial environmental changes due to global warming. Melting glaciers cause reduced salinity environments in coastal Arctic habitats, which may be stressful for kelp beds. To investigate the responses of the kelp Saccharina latissima to the warming Arctic, we studied the transcriptomic changes of S. latissima from Kongsfjorden (Svalbard, Norway) over a 24-hour exposure to two salinities (Absolute Salinity [SA ] 20 and 30) after a 7-day pre-acclimation at three temperatures (0, 8 and 15°C). In addition, corresponding physiological data were assessed during an 11-days salinity/temperature experiment. Growth and maximal quantum yield for photosystem II fluorescence were positively affected by increased temperature during acclimation, whereas hyposalinity caused negative effects at the last day of treatment. In contrast, hyposalinity induced marked changes on the transcriptomic level. Compared to the control (8°C - SA 30), the 8°C - SA 20 exhibited the highest number of differentially expressed genes (DEGs), followed by the 0°C - SA 20. Comparisons indicate that S. latissima tends to convert its energy from primary metabolism (e.g. photosynthesis) to antioxidant activity under hyposaline stress. The increase in physiological performance at 15°C shows that S. latissima in the Arctic region can adjust and might even benefit from increased temperatures. However, in Arctic fjord environments its performance might become impaired by decreased salinity as a result of ice melting.
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Affiliation(s)
- Huiru Li
- Fisheries College, Ocean University of China, Qingdao, 266003, China
- Marine Botany, Faculty Biology/Chemistry, University of Bremen, Bremen, 28359, Germany
| | - Cátia Monteiro
- Marine Botany, Faculty Biology/Chemistry, University of Bremen, Bremen, 28359, Germany
- Station Biologique de Roscoff, plateforme ABiMS, CNRS: FR2424, Sorbonne Université (UPMC), Roscoff, 29680, France
- Sorbonne Université, CNRS, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Roscoff, 29680, France
| | - Sandra Heinrich
- Molecular Plant Genetics, Institute for Plant Science and Microbiology, University of Hamburg, Hamburg, 22609, Germany
| | - Inka Bartsch
- Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany
| | - Klaus Valentin
- Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany
| | - Lars Harms
- Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27570, Germany
| | - Gernot Glöckner
- Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, 50931, Germany
| | - Erwan Corre
- Station Biologique de Roscoff, plateforme ABiMS, CNRS: FR2424, Sorbonne Université (UPMC), Roscoff, 29680, France
| | - Kai Bischof
- Marine Botany, Faculty Biology/Chemistry, University of Bremen, Bremen, 28359, Germany
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20
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Kreusch M, Poltronieri E, Bouvie F, Pereira DT, Batista D, Ramlov F, Maraschin M, Bouzon ZL, Simioni C. Cellular Responses of Gelidium floridanum (Gelidiales, Rhodophyta) Tetraspores Under Heat Wave and Copper Pollution. JOURNAL OF PHYCOLOGY 2019; 55:1394-1400. [PMID: 31519045 DOI: 10.1111/jpy.12921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
Spore settlement and development are bottlenecks for resilience of habitat-forming macroalgal species. These processes are directly related to temperature, a global stressor protagonist of ocean warming. The toxic effects of local pollutants such as copper may be worsened under a global warming scenario. Therefore, in this paper, we investigated the effects of increased temperature combined with elevated concentrations of copper on the viability, photosynthetic pigments, and ultrastructure of Gelidium floridanum tetraspores. Tetraspores were cultivated on slides with sterilized seawater or seawater enriched with CuCl2 , and incubated under 24°C or 30°C for 24 h. Tetraspores cultivated with copper 3.0 μM under 30°C had lower viability. Both temperature and copper had a significant effect on phycocyanin and phycoerythrin concentrations. Samples cultivated with copper under 30°C presented a heavily altered cellular structure, with vesicles throughout the cytoplasm, chloroplasts with altered structure and cells with degenerated cytoplasm and cell walls. Our findings show that temperature and copper significantly affect the viability, photosynthetic pigments, and ultrastructure of G. floridanum tetraspores, presenting an additive interaction for the physiology of this seaweed's early stages.
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Affiliation(s)
- Marianne Kreusch
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Elisa Poltronieri
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Fernanda Bouvie
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Débora T Pereira
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Deonir Batista
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Fernanda Ramlov
- Plant Morphogenesis and Biochemistry Laboratory, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Marcelo Maraschin
- Plant Morphogenesis and Biochemistry Laboratory, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Zenilda L Bouzon
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
| | - Carmen Simioni
- Plant Cell Biology Laboratory, Department of Cell Biology, Embryology and Genetics, Federal University of Santa Catarina, 88049-900, CP 476, Florianópolis, Santa Catarina, Brazil
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21
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Bevilacqua S, Savonitto G, Lipizer M, Mancuso P, Ciriaco S, Srijemsi M, Falace A. Climatic anomalies may create a long-lasting ecological phase shift by altering the reproduction of a foundation species. Ecology 2019; 100:e02838. [PMID: 31330045 DOI: 10.1002/ecy.2838] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/09/2019] [Accepted: 07/11/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Stanislao Bevilacqua
- Department of Life Sciences, University of Trieste, 34127, Trieste, Italy.,Conisma, Piazzale Flaminio 9, Roma, Italy
| | - Gilda Savonitto
- Department of Life Sciences, University of Trieste, 34127, Trieste, Italy
| | - Marina Lipizer
- OGS, National Institute of Oceanography and Applied Geophysics, 34127, Trieste, Italy
| | - Paolo Mancuso
- Department of Life Sciences, University of Trieste, 34127, Trieste, Italy
| | - Saul Ciriaco
- WWF Marine Protected Area of Miramare, 34127, Trieste, Italy
| | - Marina Srijemsi
- Department of Life Sciences, University of Trieste, 34127, Trieste, Italy
| | - Annalisa Falace
- Department of Life Sciences, University of Trieste, 34127, Trieste, Italy
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22
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Bennett S, Duarte CM, Marbà N, Wernberg T. Integrating within-species variation in thermal physiology into climate change ecology. Philos Trans R Soc Lond B Biol Sci 2019; 374:20180550. [PMID: 31203756 PMCID: PMC6606463 DOI: 10.1098/rstb.2018.0550] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Accurately forecasting the response of global biota to warming is a fundamental challenge for ecology in the Anthropocene. Within-species variation in thermal sensitivity, caused by phenotypic plasticity and local adaptation of thermal limits, is often overlooked in assessments of species responses to warming. Despite this, implicit assumptions of thermal niche conservatism or adaptation and plasticity at the species level permeate the literature with potentially important implications for predictions of warming impacts at the population level. Here we review how these attributes interact with the spatial and temporal context of ocean warming to influence the vulnerability of marine organisms. We identify a broad spectrum of thermal sensitivities among marine organisms, particularly in central and cool-edge populations of species distributions. These are characterized by generally low sensitivity in organisms with conserved thermal niches, to high sensitivity for organisms with locally adapted thermal niches. Important differences in thermal sensitivity among marine taxa suggest that warming could adversely affect benthic primary producers sooner than less vulnerable higher trophic groups. Embracing the spatial, temporal and biological context of within-species variation in thermal physiology helps explain observed impacts of ocean warming and can improve forecasts of climate change vulnerability in marine systems. This article is part of the theme issue ‘Physiological diversity, biodiversity patterns and global climate change: testing key hypotheses involving temperature and oxygen’.
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Affiliation(s)
- Scott Bennett
- 1 Global Change Research Group, Institut Mediterrani d'Estudis Avançats (CSIC-UIB) , Miquel Marquès 21, 07190 Esporles , Spain
| | - Carlos M Duarte
- 2 King Abdullah University of Science and Technology (KAUST), Red Sea Research Center (RSRC) and Computational Bioscience Research Center (CBRC) , Thuwal 23955-6900 , Saudi Arabia
| | - Núria Marbà
- 1 Global Change Research Group, Institut Mediterrani d'Estudis Avançats (CSIC-UIB) , Miquel Marquès 21, 07190 Esporles , Spain
| | - Thomas Wernberg
- 3 School of Biological Sciences, UWA Oceans Institute, University of Western Australia , Cnr Fairway and Service Road 4, Crawley, WA 6009 , Australia
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Bastos E, Schneider M, de Quadros DPC, Welz B, Batista MB, Horta PA, Rörig LR, Barufi JB. Phytoremediation potential of Ulva ohnoi (Chlorophyta): Influence of temperature and salinity on the uptake efficiency and toxicity of cadmium. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:334-343. [PMID: 30849653 DOI: 10.1016/j.ecoenv.2019.01.130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Ulva ohnoi is a green macroalga with fast growth and high rates of nitrogen and phosphorus absorption. Recently, this species has been recorded in several places with record green tide formation in some of them. Using molecular tools, we herein report the first occurrence of this species in Brazil and demonstrate its potential for phytoremediation in typical environmental concentrations of Cd (0.625-15 µg L-1). Similarly, the effects of physicochemical parameters (salinity and temperature) on the toxicity and uptake efficiency of this species were evaluated. Molecular analysis of two sequences (1141 bp) obtained corroborates another 34 sequences for U. ohnoi obtained from GenBank. The addition of Cd in the medium affected photosynthetic parameters and reduced growth rate. U. ohnoi showed resistance to Cd when cultivated at 18 °C, S15 and 18-25 °C, S35, at concentrations between 0.625 and 2.5 μg. L-1 of Cd; yet, positive growth rate was maintained. Dose-dependent accumulation was observed in all combinations of factors used with a maximum value of 4.20 μg Cd per gram of dry seaweed at 15 μg. L-1 of Cd at 18 °C and S35. Maximum value of the concentration factor was 81.3 ± 1.1% of Cd added at the concentration of 0.625 μg. L-1 to S15 and 18 °C. Our results demonstrate the potential of using U. ohnoi in the phytoremediation of Cd in saltwater or brackish water.
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Affiliation(s)
- Eduardo Bastos
- Programa de Pós-Graduação em Biotecnologia e Biociências, Universidade Federal de Santa Catarina, Florianópolis CEP:88040-970, Brazil.
| | - Mauana Schneider
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Daiane Paula Cunha de Quadros
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Brazil; Instituto Federal de Educação, Ciência e Tecnologia Catarinense, Ibirama, Brazil
| | - Bernhard Welz
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Brazil; Instituto Nacional de Ciência e Tecnologia do CNPq - INCT de Energia e Ambiente, Universidade Federal da Bahia, Salvador, BA, Brazil
| | - Manuela Bernardes Batista
- Programa de Pós-Graduação em Ecologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Paulo Antunes Horta
- Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Leonardo Rubi Rörig
- Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - José Bonomi Barufi
- Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil
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24
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Chefaoui RM, Serebryakova A, Engelen AH, Viard F, Serrão EA. Integrating reproductive phenology in ecological niche models changed the predicted future ranges of a marine invader. DIVERS DISTRIB 2019. [DOI: 10.1111/ddi.12910] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Rosa M. Chefaoui
- Centre for Marine Sciences (CCMAR), CIMAR Laboratório Associado University of Algarve Faro Portugal
| | - Alexandra Serebryakova
- Centre for Marine Sciences (CCMAR), CIMAR Laboratório Associado University of Algarve Faro Portugal
- Lab. Adaptation & Diversité en Milieu Marin (UMR 7144) Station Biologique de Roscoff, Sorbonne Université, CNRS Roscoff France
| | - Aschwin H. Engelen
- Centre for Marine Sciences (CCMAR), CIMAR Laboratório Associado University of Algarve Faro Portugal
| | - Frédérique Viard
- Lab. Adaptation & Diversité en Milieu Marin (UMR 7144) Station Biologique de Roscoff, Sorbonne Université, CNRS Roscoff France
| | - Ester A. Serrão
- Centre for Marine Sciences (CCMAR), CIMAR Laboratório Associado University of Algarve Faro Portugal
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25
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Martínez B, Radford B, Thomsen MS, Connell SD, Carreño F, Bradshaw CJA, Fordham DA, Russell BD, Gurgel CFD, Wernberg T. Distribution models predict large contractions of habitat-forming seaweeds in response to ocean warming. DIVERS DISTRIB 2018. [DOI: 10.1111/ddi.12767] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Brezo Martínez
- Departamento de Biología y Geología; Universidad Rey Juan Carlos; Móstoles Spain
| | - Ben Radford
- Australian Institute of Marine Science; Crawley WA Australia
| | - Mads S. Thomsen
- UWA Oceans Institute and School of Biological Sciences; The University of Western Australia; Crawley WA Australia
- Marine Ecology Research Group; School of Biological Sciences; University of Canterbury; Christchurch New Zealand
| | - Sean D. Connell
- Southern Seas Ecology Laboratories; DP418; School of Earth and Environmental Sciences; The University of Adelaide; Adelaide SA Australia
| | - Francisco Carreño
- Departamento de Biología y Geología; Universidad Rey Juan Carlos; Móstoles Spain
| | - Corey J. A. Bradshaw
- Global Ecology; College of Science and Engineering; Flinders University; Adelaide SA Australia
| | - Damien A. Fordham
- School of Earth and Environmental Sciences; The University of Adelaide; Adelaide SA Australia
| | - Bayden D. Russell
- The Swire Institute of Marine Science; School of Biological Sciences; The University of Hong Kong; Hong Kong Hong Kong
| | - C. Frederico D. Gurgel
- School of Earth and Environmental Sciences; The University of Adelaide; Adelaide SA Australia
- Department of Environment, Water and Natural Resources; State Herbarium of South Australia; Kent Town SA Australia
- South Australian Research and Development Institute; Aquatic Sciences; Henley Beach SA Australia
| | - Thomas Wernberg
- UWA Oceans Institute and School of Biological Sciences; The University of Western Australia; Crawley WA Australia
- Department of Science and Environment; Roskilde University; Roskilde Denmark
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26
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King NG, Wilcockson DC, Webster R, Smale DA, Hoelters LS, Moore PJ. Cumulative stress restricts niche filling potential of habitat-forming kelps in a future climate. Funct Ecol 2017; 32:288-299. [PMID: 29576672 PMCID: PMC5856065 DOI: 10.1111/1365-2435.12977] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 08/17/2017] [Indexed: 11/29/2022]
Abstract
Climate change is driving range contractions and local population extinctions across the globe. When this affects ecosystem engineers the vacant niches left behind are likely to alter the wider ecosystem unless a similar species can fulfil them. Here, we explore the stress physiology of two coexisting kelps undergoing opposing range shifts in the Northeast Atlantic and discuss what differences in stress physiology may mean for future niche filling. We used chlorophyll florescence (Fv/Fm) and differentiation of the heat shock response (HSR) to determine the capacity of the expanding kelp, Laminaria ochroleuca, to move into the higher shore position of the retreating kelp, Laminaria digitata. We applied both single and consecutive exposures to immersed and emersed high and low temperature treatments, replicating low tide exposures experienced in summer and winter. No interspecific differences in HSR were observed which was surprising given the species’ different biogeographic distributions. However, chlorophyll florescence revealed clear differences between species with L. ochroleuca better equipped to tolerate high immersed temperatures but showed little capacity to tolerate frosts or high emersion temperatures. Many patterns observed were only apparent after consecutive exposures. Such cumulative effects have largely been overlooked in tolerance experiments on intertidal organisms despite being more representative of the stress experienced in natural habitats. We therefore suggest future experiments incorporate consecutive stress into their design. Climate change is predicted to result in fewer ground frosts and increased summer temperatures. Therefore, L. ochroleuca may be released from its summer cold limit in winter but still be prevented from moving up the shore due to desiccation in the summer. Laminaria ochroleuca will, however, likely be able to move into tidal pools. Therefore, only partial niche filling by L. ochroleuca will be possible in this system as climate change advances.
A plain language summary is available for this article.
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Affiliation(s)
- Nathan G King
- Institute of Biological, Environmental and Rural Sciences Aberystwyth University Aberystwyth UK
| | - David C Wilcockson
- Institute of Biological, Environmental and Rural Sciences Aberystwyth University Aberystwyth UK
| | - Richard Webster
- Institute of Biological, Environmental and Rural Sciences Aberystwyth University Aberystwyth UK
| | - Dan A Smale
- Marine Biological Association of the United Kingdom The Laboratory Plymouth UK
| | - Laura S Hoelters
- Institute of Biological, Environmental and Rural Sciences Aberystwyth University Aberystwyth UK
| | - Pippa J Moore
- Institute of Biological, Environmental and Rural Sciences Aberystwyth University Aberystwyth UK.,Centre for Marine Ecosystems Research School of Natural Sciences Edith Cowan University Joondalup WA Australia
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27
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Raddatz S, Guy-Haim T, Rilov G, Wahl M. Future warming and acidification effects on anti-fouling and anti-herbivory traits of the brown alga Fucus vesiculosus (Phaeophyceae). JOURNAL OF PHYCOLOGY 2017; 53:44-58. [PMID: 27711971 DOI: 10.1111/jpy.12473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 07/24/2016] [Indexed: 06/06/2023]
Abstract
Human-induced ocean warming and acidification have received increasing attention over the past decade and are considered to have substantial consequences for a broad range of marine species and their interactions. Understanding how these interactions shift in response to climate change is particularly important with regard to foundation species, such as the brown alga Fucus vesiculosus. This macroalga represents the dominant habitat former on coastal rocky substrata of the Baltic Sea, fulfilling functions essential for the entire benthic community. Its ability to withstand extensive fouling and herbivory regulates the associated community and ecosystem dynamics. This study tested the interactive effects of future warming, acidification, and seasonality on the interactions of a marine macroalga with potential foulers and consumers. F. vesiculosus rockweeds were exposed to different combinations of conditions predicted regionally for the year 2100 (+∆5°C, +∆700 μatm CO2 ) using multifactorial long-term experiments in novel outdoor benthic mesocosms ("Benthocosms") over 9-12-week periods in four seasons. Possible shifts in the macroalgal susceptibility to fouling and consumption were tested using consecutive bioassays. Algal susceptibility to fouling and grazing varied substantially among seasons and between treatments. In all seasons, warming predominantly affected anti-fouling and anti-herbivory interactions while acidification had a subtle nonsignificant influence. Interestingly, anti-microfouling activity was highest during winter under warming, while anti-macrofouling and anti-herbivory activities were highest in the summer under warming. These contrasting findings indicate that seasonal changes in anti-fouling and anti-herbivory traits may interact with ocean warming in altering F. vesiculosus community composition in the future.
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Affiliation(s)
- Stefanie Raddatz
- Department of Benthic Ecology, GEOMAR, Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105, Kiel, Germany
| | - Tamar Guy-Haim
- Department of Marine Biology, Israel Oceanographic and Limnological Research, National Institute of Oceanography, P.O. Box 8030, Haifa, 31080, Israel
- Marine Biology Department, The Leon H. Charney School of Marine Sciences, University of Haifa, Mt. Carmel, Haifa, 31905, Israel
| | - Gil Rilov
- Department of Marine Biology, Israel Oceanographic and Limnological Research, National Institute of Oceanography, P.O. Box 8030, Haifa, 31080, Israel
| | - Martin Wahl
- Department of Benthic Ecology, GEOMAR, Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105, Kiel, Germany
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28
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Herbert RJH, Ma L, Marston A, Farnham WF, Tittley I, Cornes RC. The calcareous brown alga Padina pavonica in southern Britain: population change and tenacity over 300 years. MARINE BIOLOGY 2016; 163:46. [PMID: 26900178 PMCID: PMC4749647 DOI: 10.1007/s00227-015-2805-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
Understanding long-term persistence and variability in species populations can help to predict future survival, growth and distribution; however, sustained observations are exceedingly rare. We examine and interpret a remarkable record of the calcareous brown alga Padina pavonica (Phaeophyceae) at its northern limit on the south coast of England (50°N, 1-3°W) from 1680 to 2014, which is probably the longest compilation and review of any marine algal species. Over this period, which extends from the middle of the Little Ice Age to the present, there has been considerable variability in temperature and storminess. We identified a significant number of site extinctions in the second half of the nineteenth century, which coincided with cooler conditions and stormier weather. To interpret these changes, we measured recruitment, growth and production of tetraspores at sheltered and exposed sites in 2012-2014, years which had low and high spring temperatures. Potential spore production was greater at the sheltered site due to a longer growing period and survival of larger fronds. Delayed growth in the cooler spring resulted in smaller fronds and lower potential production of tetraspores by early summer. Yet in the warmer year, rapid initial growth caused higher sensitivity to damage and dislodgement by summer storms, which also limited potential spore production. Antagonistic responses to multiple stressors and disturbances make future predictions of survival and distribution difficult. Fronds of Padinapavonica are sensitive to both temperature and physical disturbances, yet vegetative perennation appears to have enabled population persistence and explained the longevity of remaining populations.
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Affiliation(s)
- Roger J. H. Herbert
- />Faculty of Science and Technology, Department of Life and Environmental Sciences, Bournemouth University, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB UK
| | - Lisha Ma
- />Faculty of Science and Technology, Department of Life and Environmental Sciences, Bournemouth University, Talbot Campus, Fern Barrow, Poole, Dorset BH12 5BB UK
| | - Anne Marston
- />Isle of Wight Local Records Centre, Seaclose Offices, Fairlee Road, Newport, Isle of Wight PO30 2QS UK
| | - William F. Farnham
- />Institute of Marine Sciences, School of Biological Sciences, Portsmouth University, Ferry Road, Eastney, Portsmouth, PO1 2DY UK
| | - Ian Tittley
- />The Natural History Museum, Cromwell Road, London, SW7 5BD UK
| | - Richard C. Cornes
- />Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, UK
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29
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Mertens NL, Russell BD, Connell SD. Escaping herbivory: ocean warming as a refuge for primary producers where consumer metabolism and consumption cannot pursue. Oecologia 2015; 179:1223-9. [PMID: 26363905 DOI: 10.1007/s00442-015-3438-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 08/30/2015] [Indexed: 10/23/2022]
Abstract
Ocean warming is anticipated to strengthen the persistence of turf-forming habitat, yet the concomitant elevation of grazer metabolic rates may accelerate per capita rates of consumption to counter turf predominance. Whilst this possibility of strong top-down control is supported by the metabolic theory of ecology (MTE), it assumes that consumer metabolism and consumption keep pace with increasing production. This assumption was tested by quantifying the metabolic rates of turfs and herbivorous gastropods under a series of elevated temperatures in which the ensuing production and consumption were observed. We discovered that as temperature increases towards near-future levels (year 2100), consumption rates of gastropods peak earlier than the rate of growth of producers. Hence, turfs have greater capacity to persist under near-future temperatures than the capacity for herbivores to counter their growth. These results suggest that whilst MTE predicts stronger top-down control, understanding whether consumer-producer responses are synchronous is key to assessing the future strength of top-down control.
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Affiliation(s)
- Nicole L Mertens
- Southern Seas Ecology Laboratories, School of Biological Sciences, University of Adelaide, Adelaide, SA, 5005, Australia
| | - Bayden D Russell
- Southern Seas Ecology Laboratories, School of Biological Sciences, University of Adelaide, Adelaide, SA, 5005, Australia
- Swire Institute of Marine Science and School of Biological Sciences, University of Hong Kong, Hong Kong SAR, China
| | - Sean D Connell
- Southern Seas Ecology Laboratories, School of Biological Sciences, University of Adelaide, Adelaide, SA, 5005, Australia.
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30
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Marcelino VR, Verbruggen H. Ecological niche models of invasive seaweeds. JOURNAL OF PHYCOLOGY 2015; 51:606-620. [PMID: 26986785 DOI: 10.1111/jpy.12322] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 06/09/2015] [Indexed: 06/05/2023]
Abstract
Ecological niche models (ENMs) are commonly used to calculate habitat suitability from species' occurrence and macroecological data. In invasive species biology, ENMs can be applied to anticipate whether invasive species are likely to establish in an area, to identify critical routes and arrival points, to build risk maps and to predict the extent of potential spread following an introduction. Most studies using ENMs focus on terrestrial organisms and applications in the marine realm are still relatively rare. Here, we review some common methods to build ENMs and their application in seaweed invasion biology. We summarize methods and concepts involved in the development of niche models, show examples of how they have been applied in studies on algae and discuss the application of ENMs in invasive algae research and to predict effects of climate change on seaweed distributions.
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Affiliation(s)
- Vanessa R Marcelino
- School of BioSciences, University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Heroen Verbruggen
- School of BioSciences, University of Melbourne, Melbourne, Victoria, 3010, Australia
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32
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Photosynthetic plasticity of the genus Asparagopsis (Bonnemaisoniales, Rhodophyta) in response to temperature: implications for invasiveness. Biol Invasions 2014. [DOI: 10.1007/s10530-014-0797-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Isolation and identification of oedogonium species and strains for biomass applications. PLoS One 2014; 9:e90223. [PMID: 24603705 PMCID: PMC3946159 DOI: 10.1371/journal.pone.0090223] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 01/30/2014] [Indexed: 11/19/2022] Open
Abstract
Freshwater macroalgae from the genus Oedogonium have recently been targeted for biomass applications; however, strains of Oedogonium for domestication have not yet been identified. Therefore, the objective of this study was to compare the performance of isolates of Oedogonium collected from multiple geographic locations under varying environmental conditions. We collected and identified wild-type isolates of Oedogonium from three geographic locations in Eastern Australia, then measured the growth of these isolates under a range of temperature treatments corresponding to ambient conditions in each geographic location. Our sampling identified 11 isolates of Oedogonium that could be successfully maintained under culture conditions. It was not possible to identify most isolates to species level using DNA barcoding techniques or taxonomic keys. However, there were considerable genetic and morphological differences between isolates, strongly supporting each being an identifiable species. Specific growth rates of species were high (>26% day-1) under 7 of the 9 temperature treatments (average tested temperature range: 20.9-27.7°C). However, the variable growth rates of species under lower temperature treatments demonstrated that some were better able to tolerate lower temperatures. There was evidence for local adaptation under lower temperature treatments (winter conditions), but not under higher temperature treatments (summer conditions). The high growth rates we recorded across multiple temperature treatments for the majority of species confirm the suitability of this diverse genus for biomass applications and the domestication of Oedogonium.
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34
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Reusch TBH. Climate change in the oceans: evolutionary versus phenotypically plastic responses of marine animals and plants. Evol Appl 2014; 7:104-22. [PMID: 24454551 PMCID: PMC3894901 DOI: 10.1111/eva.12109] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 08/29/2013] [Indexed: 12/13/2022] Open
Abstract
I summarize marine studies on plastic versus adaptive responses to global change. Due to the lack of time series, this review focuses largely on the potential for adaptive evolution in marine animals and plants. The approaches were mainly synchronic comparisons of phenotypically divergent populations, substituting spatial contrasts in temperature or CO2 environments for temporal changes, or in assessments of adaptive genetic diversity within populations for traits important under global change. The available literature is biased towards gastropods, crustaceans, cnidarians and macroalgae. Focal traits were mostly environmental tolerances, which correspond to phenotypic buffering, a plasticity type that maintains a functional phenotype despite external disturbance. Almost all studies address coastal species that are already today exposed to fluctuations in temperature, pH and oxygen levels. Recommendations for future research include (i) initiation and analyses of observational and experimental temporal studies encompassing diverse phenotypic traits (including diapausing cues, dispersal traits, reproductive timing, morphology) (ii) quantification of nongenetic trans-generational effects along with components of additive genetic variance (iii) adaptive changes in microbe-host associations under the holobiont model in response to global change (iv) evolution of plasticity patterns under increasingly fluctuating environments and extreme conditions and (v) joint consideration of demography and evolutionary adaptation in evolutionary rescue approaches.
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Affiliation(s)
- Thorsten B H Reusch
- GEOMAR Helmholtz-Centre for Ocean Research Kiel, Marine Ecology - Evolutionary Ecology of Marine Fishes Kiel, Germany
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35
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Harley CDG, Anderson KM, Demes KW, Jorve JP, Kordas RL, Coyle TA, Graham MH. EFFECTS OF CLIMATE CHANGE ON GLOBAL SEAWEED COMMUNITIES. JOURNAL OF PHYCOLOGY 2012; 48:1064-78. [PMID: 27011268 DOI: 10.1111/j.1529-8817.2012.01224.x] [Citation(s) in RCA: 209] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 07/17/2012] [Indexed: 05/11/2023]
Abstract
Seaweeds are ecologically important primary producers, competitors, and ecosystem engineers that play a central role in coastal habitats ranging from kelp forests to coral reefs. Although seaweeds are known to be vulnerable to physical and chemical changes in the marine environment, the impacts of ongoing and future anthropogenic climate change in seaweed-dominated ecosystems remain poorly understood. In this review, we describe the ways in which changes in the environment directly affect seaweeds in terms of their physiology, growth, reproduction, and survival. We consider the extent to which seaweed species may be able to respond to these changes via adaptation or migration. We also examine the extensive reshuffling of communities that is occurring as the ecological balance between competing species changes, and as top-down control by herbivores becomes stronger or weaker. Finally, we delve into some of the ecosystem-level responses to these changes, including changes in primary productivity, diversity, and resilience. Although there are several key areas in which ecological insight is lacking, we suggest that reasonable climate-related hypotheses can be developed and tested based on current information. By strategically prioritizing research in the areas of complex environmental variation, multiple stressor effects, evolutionary adaptation, and population, community, and ecosystem-level responses, we can rapidly build upon our current understanding of seaweed biology and climate change ecology to more effectively conserve and manage coastal ecosystems.
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Affiliation(s)
- Christopher D G Harley
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T1Z4, Canada
| | - Kathryn M Anderson
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T1Z4, Canada
| | - Kyle W Demes
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T1Z4, Canada
| | - Jennifer P Jorve
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T1Z4, Canada
| | - Rebecca L Kordas
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T1Z4, Canada
| | - Theraesa A Coyle
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, 6270 University Blvd, Vancouver, British Columbia, V6T1Z4, Canada
| | - Michael H Graham
- Moss Landing Marine Laboratories, 8272 Moss Landing Road, Moss Landing, California, 95039, USA
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