Hydrobiologia最新文献_第8页

Differences in bacterial community composition between fish-stocked and fishless lakes from an arid Patagonian plateau 巴塔哥尼亚干旱高原有鱼湖和无鱼湖细菌群落组成的差异

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-07-02 DOI: 10.1007/s10750-024-05622-2

Carmen Sabio y García, Sol Porcel, M. Romina Schiaffino, Julio Lancelotti, María Cristina Marinone, Sebastián Metz, Ignacio Roesler, Irina Izaguirre

{"title":"Differences in bacterial community composition between fish-stocked and fishless lakes from an arid Patagonian plateau","authors":"Carmen Sabio y García, Sol Porcel, M. Romina Schiaffino, Julio Lancelotti, María Cristina Marinone, Sebastián Metz, Ignacio Roesler, Irina Izaguirre","doi":"10.1007/s10750-024-05622-2","DOIUrl":"https://doi.org/10.1007/s10750-024-05622-2","url":null,"abstract":"Bacterial community composition (BCC) can be modulated by different indirect and direct factors. The Strobel Lake Plateau (Patagonia, Argentina) holds natural fishless lakes. Fish introduction in some of these lakes has affected the structure of their zooplankton, phytoplankton and autotrophic picoplankton communities, whereas its effects on bacterioplankton are unknown. Hence, we analyzed BCC to assess the potential effect of fish introduction on this community in lakes of this region. We sampled fishless and fish-stocked lakes during three summer campaigns and analyzed the BCC. Our results revealed a contrasting arrangement in the main limnological variables and significant differences in the BCC between fishless and stocked lakes. In fish-stocked lakes, Alphaproteobacteria class had a higher proportion and SAR11_cladeIII was the most abundant amplicon sequence variant (ASV); these lakes also showed a marginally higher mean richness but less exclusive ASVs. Environmental and biotic factors contributed to explain BCC variations. The lower percentage of exclusive ASVs and the closer BCC ordination in a non-metric multidimensional scaling suggest a homogenizing effect in fish-stocked lakes. This study contributes to understand the consequences of fish introduction on the plankton communities in lakes of this invaluable region for biodiversity conservation.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"19 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the effects of dreissenid mussel shells in streams post-invasion 调查入侵后溪流中天红贻贝贝壳的影响

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-07-01 DOI: 10.1007/s10750-024-05627-x

Darrin S. Hunt, Donna R. Kashian

{"title":"Investigating the effects of dreissenid mussel shells in streams post-invasion","authors":"Darrin S. Hunt, Donna R. Kashian","doi":"10.1007/s10750-024-05627-x","DOIUrl":"https://doi.org/10.1007/s10750-024-05627-x","url":null,"abstract":"The ecological impact of dreissenid mussel (e.g., quagga and zebra) populations and their empty shells on native fauna in large rivers and lakes has been extensively studied. However, there is limited information on their effects in small wadable streams. Although established mussel populations in these systems are uncommon, their shells are found in high densities in benthic environments and may adversely impact stream communities. Shell densities were quantified using quadrats in two wadable streams to assess impacts on native benthic macroinvertebrates and fish. Eight reaches of each river were sampled, four with dreissenids and four without, totaling 16 locations. Macroinvertebrate and fish communities were characterized using diversity and environmental tolerance indices. Shell densities were significantly higher in dreissenid-invaded sites compared to sites with only native bivalves in both rivers. Dense shell beds had degraded biological conditions with fewer sensitive macroinvertebrates, but bed density did not affect overall macroinvertebrate or fish diversity. These findings differ from lake and large river studies, which found a greater impact of dreissenid shell deposition on macroinvertebrate and fish diversity than we observed in small wadable streams. Thus, a different approach to management and restoration may be necessary to maintain a natural community composition in wadable streams.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"35 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pathways of invasion of the threespine stickleback (Gasterosteus aculeatus) into the basins of the Black and Caspian seas 三刺鱼入侵黑海和里海盆地的途径

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-28 DOI: 10.1007/s10750-024-05617-z

N. V. Bardukov, A. A. Bugakov, H. S. Gajduchenko, A. V. Koulish, A. A. Makhrov, A. Panfiliy, A. N. Pashkov, D. S. Petrushkieva, A. N. Reshetnikov, S. I. Reshetnikov, D. Yu. Semenov, V. S. Artamonova

{"title":"Pathways of invasion of the threespine stickleback (Gasterosteus aculeatus) into the basins of the Black and Caspian seas","authors":"N. V. Bardukov, A. A. Bugakov, H. S. Gajduchenko, A. V. Koulish, A. A. Makhrov, A. Panfiliy, A. N. Pashkov, D. S. Petrushkieva, A. N. Reshetnikov, S. I. Reshetnikov, D. Yu. Semenov, V. S. Artamonova","doi":"10.1007/s10750-024-05617-z","DOIUrl":"https://doi.org/10.1007/s10750-024-05617-z","url":null,"abstract":"Studying the routes of invasion of the threespine stickleback is important both because it serves as a model species in evolutionary research and because it may play a substantial role in ecosystems. The goal of this study was to determine the recent pathways of threespine stickleback invasion into the Black and Caspian Sea basins. The partial COI and cyt b mitochondrial gene sequences and the mtDNA region between them (a total of 9926 bp) have been analyzed in a priori separate phylogenetic lineages, Black Sea and American ones. The results indicate that similar sequences of the COI gene may result from parallel evolution in different lineages. The basins of the Volga and Dnieper, the largest rivers of the Ponto-Caspian basin, are currently inhabited only by carriers of the European lineage haplotypes; this agrees with the data on the disappearance of aboriginal stickleback populations from these river basins in the first half of the twentieth century. Only Black Sea lineage haplotypes have been found in stickleback from the recently formed populations of the Caspian Sea coast. The results show that alien conspecifics may substantially affect the genetic structure of threespine stickleback populations in the native species range.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"32 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Giant kelp recruitment declines and changes in understory algae in a sub-Antarctic urban ecosystem 亚南极城市生态系统中巨型海藻新陈代谢的衰退和底层藻类的变化

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-26 DOI: 10.1007/s10750-024-05623-1

Julieta Kaminsky, María Bagur, Alicia Boraso, Mariano Rodríguez, Alejandro H. Buschmann, María Liliana Quartino, Irene R. Schloss

{"title":"Giant kelp recruitment declines and changes in understory algae in a sub-Antarctic urban ecosystem","authors":"Julieta Kaminsky, María Bagur, Alicia Boraso, Mariano Rodríguez, Alejandro H. Buschmann, María Liliana Quartino, Irene R. Schloss","doi":"10.1007/s10750-024-05623-1","DOIUrl":"https://doi.org/10.1007/s10750-024-05623-1","url":null,"abstract":"While there is a global trend in kelp forests decline, sub-Antarctic Beagle Channel kelp ecosystems are among the most stable and extensive in the world, acting as a climatic refuge, indicating its high conservation value. Nevertheless, these coastal ecosystems are increasingly exposed to anthropogenic drivers that can affect kelp strategies and promote their replacement by turf. This study evaluated the urban impact of a coastal city in the Beagle Channel (Ushuaia, 54° S 68° W) on giant kelp (Macrocystis pyrifera) population dynamics. Seasonal samplings were conducted between 2020 and 2023 in two contrasting sites: an urban site directly exposed to Ushuaia pressures and a non-urban site. Our results indicate a reduction in both kelp adult density and kelp recruitment at the urban site. Here, high sediment inputs were the main factor affecting kelp recruitment, but higher density of potential grazers, and changes in the understory macroalgae assemblage were further observed. Morpho-functional composition and sediment trapped within the macroalgae suggest the prevalence of turf-forming algae dominating the urban site’s understory assemblage. If neglected, the decline in kelp recruitment rates and the replacement of the forest by turf could eventually lead to a local loss of this urban-influenced sub-Antarctic kelp forest.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"3 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Better growth and photosynthetic performance of Elodea nuttallii to short-term hydrogen sulfide than native Hydrilla verticillata 与本地水草相比，营养叶草在短期硫化氢条件下的生长和光合作用表现更佳

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-26 DOI: 10.1007/s10750-024-05592-5

Huimin Liu, Huixiong Huang, Haihao Yu, Shufeng Fan, Chunhua Liu

{"title":"Better growth and photosynthetic performance of Elodea nuttallii to short-term hydrogen sulfide than native Hydrilla verticillata","authors":"Huimin Liu, Huixiong Huang, Haihao Yu, Shufeng Fan, Chunhua Liu","doi":"10.1007/s10750-024-05592-5","DOIUrl":"https://doi.org/10.1007/s10750-024-05592-5","url":null,"abstract":"Sulfur deposition and eutrophication accelerated the production of hydrogen sulfide (H2S) in aquatic ecosystems. However, the understanding of how H2S affects the invasive potential of exotic aquatic plants is inadequate. Here, the exotic Elodea nuttallii (Planch.) H. St. John was exposed to five H2S concentrations (0–1.0 mM) and compared with the native Hydrilla verticillata (L. f.) Royle. Both plants grew well below 0.5 mM H2S, with E. nuttallii showing better performance. E. nuttallii and H. verticillata maintained their height growth rates by reducing the ramets number and the relative growth rate, respectively. This trade-off in morphological traits was for adequate light and oxygen. Furthermore, E. nuttallii exhibited higher chlorophyll and carotenoids content but lower chlorophyll a/b, indicating better utilization of low light in the water body. High concentrations of H2S induced oxidative stress in E. nuttallii, leading to higher superoxide dismutase (SOD), soluble sugars, and starch. The utilization strategies of C, N, P and S by E. nuttallii remained unchanged with varying H2S concentrations, demonstrating higher stoichiometric stability. In conclusion, E. nuttallii showed greater resistance to H2S compared to H. verticillata. The invasive potential of E. nuttallii in H2S-enriched aquatic environments was depending on the H2S concentration of native community.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"355 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Universal framework for assessing the environmental impact of marine non-indigenous species in different situations of data availability 在数据可用性不同的情况下评估海洋非本地物种环境影响的通用框架

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-25 DOI: 10.1007/s10750-024-05619-x

Jonne Kotta, Henn Ojaveer, Ants Kaasik, Robert Szava-Kovats, Kristiina Nurkse, Okko Outinen, Heli Einberg, Anastasija Zaiko, Maiju Lehtiniemi, Helen Orav-Kotta, Francisco R. Barboza

{"title":"Universal framework for assessing the environmental impact of marine non-indigenous species in different situations of data availability","authors":"Jonne Kotta, Henn Ojaveer, Ants Kaasik, Robert Szava-Kovats, Kristiina Nurkse, Okko Outinen, Heli Einberg, Anastasija Zaiko, Maiju Lehtiniemi, Helen Orav-Kotta, Francisco R. Barboza","doi":"10.1007/s10750-024-05619-x","DOIUrl":"https://doi.org/10.1007/s10750-024-05619-x","url":null,"abstract":"Current methods for assessing the environmental impacts of marine non-indigenous species (NIS) are limited by insufficient data, an over-reliance on expert judgement and too coarse a spatial resolution, which hampers accurate local management. However, advances in data-driven analyses offer significant potential for developing more comprehensive and accurate frameworks for assessing the impacts of NIS in marine ecosystems. This study fills this major gap in NIS management by proposing a comprehensive and practical framework that integrates systematic reviews, meta-analyses, species distribution modelling, and expert judgement to assess NIS impacts across varying levels of information availability. The framework also recommends complementary, under-utilised data sources, and tools to reduce significantly existing information constraints. The framework presented in this study not only advances scientific understanding of NIS impacts by providing a scalable and adaptable framework for assessing NIS impacts in different ecological contexts, but also provides practical tools for environmental managers implementing legislation on NIS. We recognise that although our data-driven approach to NIS management is best handled by specialists, maximising its potential requires making the information accessible and user-friendly to a broader audience. This can be achieved through digital tools that simplify and facilitate the understanding of these assessments for environmental managers.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"17 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interspecific variation in the defensive responses of brown frogs to alien predators 褐蛙对外来捕食者的防御反应的种间差异

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-25 DOI: 10.1007/s10750-024-05624-0

Andrea Gazzola, Alessandro Balestrieri, Mattia Martinelli, Sara Rocchetta, Alberto Iori, Daniele Pellitteri-Rosa

{"title":"Interspecific variation in the defensive responses of brown frogs to alien predators","authors":"Andrea Gazzola, Alessandro Balestrieri, Mattia Martinelli, Sara Rocchetta, Alberto Iori, Daniele Pellitteri-Rosa","doi":"10.1007/s10750-024-05624-0","DOIUrl":"https://doi.org/10.1007/s10750-024-05624-0","url":null,"abstract":"Alien species impact native amphibians through various direct effects, including predation, and pose a significant threat to naïve prey populations. In this study, we exposed tadpoles of three brown frog species (Rana dalmatina, Rana latastei, and Rana temporaria) to the olfactory cues of two alien predators, the pond slider (Trachemys scripta) and red swamp crayfish (Procambarus clarkii), and compared their responses to those induced by the aquatic larvae of a widespread native predator, the Southern hawker (Aeshna cyanea). We recorded two tadpole defensive behaviors, the proportion of time they were active and the number of freezing events. Both agile frog species, R. dalmatina and R. latastei, showed moderate responses to red swamp crayfish kairomones and strong responses to both odonate larvae and pond sliders. In contrast, the common frog (R. temporaria) displayed a less intense response to crayfish with respect to odonate larvae, and a negligible response to pond sliders. Long-lasting coexistence with either European pond turtles or pond sliders may explain the strength of agile frogs’ response toward the alien species; while, the historical range of the white-clawed crayfish (Austropotamobius pallipes) overlapped that of the common frog, enhancing the co-option of alien crayfish cues by this anuran species.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"90 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing a standardized method to identify optimal baselines for trophic position estimation in stable isotope studies of stream ecosystems 评估在溪流生态系统稳定同位素研究中确定营养位置估算最佳基线的标准化方法

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-25 DOI: 10.1007/s10750-024-05618-y

Nathan T. Barrus, Bryan M. Maitland, Frank J. Rahel

{"title":"Assessing a standardized method to identify optimal baselines for trophic position estimation in stable isotope studies of stream ecosystems","authors":"Nathan T. Barrus, Bryan M. Maitland, Frank J. Rahel","doi":"10.1007/s10750-024-05618-y","DOIUrl":"https://doi.org/10.1007/s10750-024-05618-y","url":null,"abstract":"Nitrogen stable isotope ratios (δ15N) are widely used to quantify trophic position in aquatic ecosystems. Comparing trophic position across space requires identifying baselines to account for variation in δ15N values of basal energy resources, but few standardized methods exist for identifying suitable baselines. We evaluated a standardized method for identifying optimal isotopic baselines in streams spanning the Rocky Mountains–Great Plains ecotone. We assessed candidate taxonomic groups and feeding groups following four criteria: (1) Organisms should be easy to collect and widely distributed, (2) Within-site δ15N variation should be low (representative of uniform feeding behavior), (3) δ15N values should be correlated with geographic variability in δ15N values, and (4) Trophic position of consumers calculated using the baseline should be independent of geographic δ15N variability when there is no change in diet. Simuliidae (obligate, sestonic filter feeders) met all four criteria for four fishes and produced trophic position estimates consistent with dietary changes for brown trout along a longitudinal stream gradient. The four-criteria screening method is suitable for temperate streams in North America and supports the recommendation to use Simuliidae or potentially grouped filter feeders as baseline organisms for stable isotope studies quantifying trophic position in higher-order consumers.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"6 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic structuring and conservation of sockeye salmon on the Asian coast of the North Pacific: identification of regional stock complexes 北太平洋亚洲沿岸红鲑的遗传结构和保护：确定区域种群复合体

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-24 DOI: 10.1007/s10750-024-05616-0

Anastasia M. Khrustaleva

{"title":"Genetic structuring and conservation of sockeye salmon on the Asian coast of the North Pacific: identification of regional stock complexes","authors":"Anastasia M. Khrustaleva","doi":"10.1007/s10750-024-05616-0","DOIUrl":"https://doi.org/10.1007/s10750-024-05616-0","url":null,"abstract":"In order to describe large-scale spatial structure of sockeye salmon on the Asian part of the range, the variability of 45 SNP loci was analyzed in 22 samples from the Northwest coast of the Pacific Ocean. Three large regional population complexes were identified: Southwest Kamchatka, Kamchatka River basin, and the Northeast (comprising stocks from Koryak Highlands). Populations within the identified complexes are connected by gene migration and have a common origin, close geographic proximity, comparable climatic, landscape, and environmental conditions in the freshwater and early marine periods of sockeye salmon life. Populations confined to watersheds of the North coast of the Sea of Okhotsk (Palana and Okhota rivers), along with island populations, displayed distinctions from the isolated population complexes. It is hypothesized that the marked divergence observed in island populations is primarily caused by genetic drift occurring during long periods of isolation. The pronounced divergence of Palana River population may be the result of both genetic drift and natural selection, driven by the challenging smoltification and specific conditions of freshwater period in this watershed. At the same time in the Okhota River population, demographic factors such as genetic drift and bottlenecks played a key role.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"21 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harvesting impact on a commercially important red macroalga on a North-East Atlantic rocky shore 捕捞对东北大西洋岩岸一种具有重要商业价值的红色大型藻类的影响

IF 2.6 3区生物学

Hydrobiologia Pub Date : 2024-06-22 DOI: 10.1007/s10750-024-05591-6

Jessica Knoop, Sara Barrento, John N. Griffin

{"title":"Harvesting impact on a commercially important red macroalga on a North-East Atlantic rocky shore","authors":"Jessica Knoop, Sara Barrento, John N. Griffin","doi":"10.1007/s10750-024-05591-6","DOIUrl":"https://doi.org/10.1007/s10750-024-05591-6","url":null,"abstract":"Red macroalgae in the genus Porphyra are widely collected for human consumption and increasingly harvested along the North Atlantic coasts but their ability to withstand repeated harvesting and maintain high cover and abundance on natural shorelines remains poorly explored, raising sustainability concerns. Therefore, we investigated the effect of frequent hand-harvesting on Porphyra dioica in a population in South Wales, UK, where it is commercially harvested. Twelve control and twelve treatment quadrats were installed in spring and six control and treatment plots in autumn. Monthly hand-harvesting of P. dioica individuals larger than 5 cm was performed in the treatment plots, while the control plots remained undisturbed. We monitored P. dioica percentage cover, yield, thallus length and recruit density, as well as benthic flora and fauna. Harvesting only impacted P. dioica thallus length, resulting in 41% smaller thalli compared to unharvested plots during summer, with possible long-term implications (e.g. reproductive output). Strong seasonality of P. dioica cover and yield was observed, peaking during spring and summer. The results suggest high resilience of the opportunistic life strategy of P. dioica under frequent harvesting, but to allow for full recovery, we urge for a recovery period of more than the tested 4 weeks.","PeriodicalId":13147,"journal":{"name":"Hydrobiologia","volume":"31 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0