{"title":"自上而下和自下而上对巴塔哥尼亚海绵 Hymeniacidon perlevis (Montagu, 1814) 调节作用的相对贡献:一种实验和观察方法","authors":"Macarena Marello Buch, Marianela Gastaldi, Mariza Abrameto, Fausto Nahuel Firstater","doi":"10.1007/s12237-024-01397-w","DOIUrl":null,"url":null,"abstract":"<p>Bottom-up and top-down controls regulate the structure and function of ecosystems through trophic resources and consumption pressure, respectively. The relative contributions of both controls over tropical sponges have been documented; however, it remains unknown how these controls regulate sponge populations in temperate environments. We focused on the globally distributed sponge <i>Hymeniacidon perlevis</i> inhabiting two tidal channels in San Antonio Bay (Argentine Patagonia) with different anthropogenic nutrient loads and experimentally tested the relative contribution of spongivores (i.e., sponge consumers) and trophic resources (i.e., dissolved inorganic nutrients and POC proxies) in sponge growth. The presence of spongivores was evaluated, as well as the relevance of trophic resource concentrations in the sponge abundance pattern. <i>Hymeniacidon perlevis</i> was more abundant (5.42% vs. 1.29% in cover), grew more (39.6% vs. −10.9% in volume, 89.5% vs 13.9% in surface area), and experienced less biomass reduction (−19.9% vs. −46.2% in dry weight) in the channel with the highest concentration of trophic resources compared to the non-enriched channel, while spongivores had a negligible effect. Among trophic resources, nitrate concentration was the one that best explained the abundance pattern of <i>H. perlevis</i>, with sponge cover changing by 1.02% for each µmol L<sup>−</sup> change in nitrate concentration. Overall, our results show that the population of <i>H. perlevis</i> is mostly bottom-up controlled. The role of a microbial symbiotic pathway in the fulfillment of the nutritional requirements of <i>H. perlevis</i> is also discussed.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":11921,"journal":{"name":"Estuaries and Coasts","volume":"7 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Relative Contribution of Top-Down and Bottom-Up Controls on the Regulation of the Sponge Hymeniacidon perlevis (Montagu, 1814) in Patagonia: An Experimental and Observational Approach\",\"authors\":\"Macarena Marello Buch, Marianela Gastaldi, Mariza Abrameto, Fausto Nahuel Firstater\",\"doi\":\"10.1007/s12237-024-01397-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Bottom-up and top-down controls regulate the structure and function of ecosystems through trophic resources and consumption pressure, respectively. The relative contributions of both controls over tropical sponges have been documented; however, it remains unknown how these controls regulate sponge populations in temperate environments. We focused on the globally distributed sponge <i>Hymeniacidon perlevis</i> inhabiting two tidal channels in San Antonio Bay (Argentine Patagonia) with different anthropogenic nutrient loads and experimentally tested the relative contribution of spongivores (i.e., sponge consumers) and trophic resources (i.e., dissolved inorganic nutrients and POC proxies) in sponge growth. The presence of spongivores was evaluated, as well as the relevance of trophic resource concentrations in the sponge abundance pattern. <i>Hymeniacidon perlevis</i> was more abundant (5.42% vs. 1.29% in cover), grew more (39.6% vs. −10.9% in volume, 89.5% vs 13.9% in surface area), and experienced less biomass reduction (−19.9% vs. −46.2% in dry weight) in the channel with the highest concentration of trophic resources compared to the non-enriched channel, while spongivores had a negligible effect. Among trophic resources, nitrate concentration was the one that best explained the abundance pattern of <i>H. perlevis</i>, with sponge cover changing by 1.02% for each µmol L<sup>−</sup> change in nitrate concentration. Overall, our results show that the population of <i>H. perlevis</i> is mostly bottom-up controlled. The role of a microbial symbiotic pathway in the fulfillment of the nutritional requirements of <i>H. perlevis</i> is also discussed.</p><h3 data-test=\\\"abstract-sub-heading\\\">Graphical Abstract</h3>\\n\",\"PeriodicalId\":11921,\"journal\":{\"name\":\"Estuaries and Coasts\",\"volume\":\"7 1\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-07-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Estuaries and Coasts\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1007/s12237-024-01397-w\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Estuaries and Coasts","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s12237-024-01397-w","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Relative Contribution of Top-Down and Bottom-Up Controls on the Regulation of the Sponge Hymeniacidon perlevis (Montagu, 1814) in Patagonia: An Experimental and Observational Approach
Bottom-up and top-down controls regulate the structure and function of ecosystems through trophic resources and consumption pressure, respectively. The relative contributions of both controls over tropical sponges have been documented; however, it remains unknown how these controls regulate sponge populations in temperate environments. We focused on the globally distributed sponge Hymeniacidon perlevis inhabiting two tidal channels in San Antonio Bay (Argentine Patagonia) with different anthropogenic nutrient loads and experimentally tested the relative contribution of spongivores (i.e., sponge consumers) and trophic resources (i.e., dissolved inorganic nutrients and POC proxies) in sponge growth. The presence of spongivores was evaluated, as well as the relevance of trophic resource concentrations in the sponge abundance pattern. Hymeniacidon perlevis was more abundant (5.42% vs. 1.29% in cover), grew more (39.6% vs. −10.9% in volume, 89.5% vs 13.9% in surface area), and experienced less biomass reduction (−19.9% vs. −46.2% in dry weight) in the channel with the highest concentration of trophic resources compared to the non-enriched channel, while spongivores had a negligible effect. Among trophic resources, nitrate concentration was the one that best explained the abundance pattern of H. perlevis, with sponge cover changing by 1.02% for each µmol L− change in nitrate concentration. Overall, our results show that the population of H. perlevis is mostly bottom-up controlled. The role of a microbial symbiotic pathway in the fulfillment of the nutritional requirements of H. perlevis is also discussed.
期刊介绍:
Estuaries and Coasts is the journal of the Coastal and Estuarine Research Federation (CERF). Begun in 1977 as Chesapeake Science, the journal has gradually expanded its scope and circulation. Today, the journal publishes scholarly manuscripts on estuarine and near coastal ecosystems at the interface between the land and the sea where there are tidal fluctuations or sea water is diluted by fresh water. The interface is broadly defined to include estuaries and nearshore coastal waters including lagoons, wetlands, tidal fresh water, shores and beaches, but not the continental shelf. The journal covers research on physical, chemical, geological or biological processes, as well as applications to management of estuaries and coasts. The journal publishes original research findings, reviews and perspectives, techniques, comments, and management applications. Estuaries and Coasts will consider properly carried out studies that present inconclusive findings or document a failed replication of previously published work. Submissions that are primarily descriptive, strongly place-based, or only report on development of models or new methods without detailing their applications fall outside the scope of the journal.