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Guerra‐Castro EJ, Conde JE, Barcelo A, Cruz‐Motta JJ. Variation in fouling assemblages associated with prop roots of
Rhizophora mangle
L. in the Caribbean: The role of neutral and niche processes. AUSTRAL ECOL 2021. [DOI: 10.1111/aec.13071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Edlin J. Guerra‐Castro
- Centro de Ecología Instituto Venezolano de Investigaciones Científicas Altos de Pipe, Caracas 1020‐A Venezuela
- Escuela Nacional de Estudios Superiores Unidad Mérida Universidad Nacional Autónoma de México Mérida, Yucatán México
| | - Jesús Eloy Conde
- Centro de Ecología Instituto Venezolano de Investigaciones Científicas Altos de Pipe, Caracas 1020‐A Venezuela
| | - Amalia Barcelo
- Escuela de Ciencias Aplicadas del Mar Universidad de Oriente Núcleo Nueva Esparta Boca de Río, Isla de Margarita Venezuela
| | - Juan J. Cruz‐Motta
- Laboratorio de Ecología Experimental Departamento de Estudios Ambientales Universidad Simón Bolívar Sartenejas Caracas Venezuela
- Department of Marine Sciences University of Puerto Rico Mayagüez Puerto Rico
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Potter IC, Rose TH, Huisman JM, Hall NG, Denham A, Tweedley JR. Large variations in eutrophication among estuaries reflect massive differences in composition and biomass of macroalgal drift. MARINE POLLUTION BULLETIN 2021; 167:112330. [PMID: 33932640 DOI: 10.1016/j.marpolbul.2021.112330] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 03/28/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Abstract
The characteristics of detached macroalgae (drift) in nearby highly eutrophic and mesotrophic estuaries in south-western Australia are compared to elucidate the magnitude and types of changes that occur in macroalgal drift when estuaries receive excessive nutrient input. Drift characteristics in the large basins of the microtidal, eutrophic Peel-Harvey and mesotrophic Swan-Canning, which is not subjected to large nutrient inputs directly from agricultural land, differed markedly. Biomass (dry weight) in mesotrophic estuary was dominated by rhodophytes (92%), particularly Laurencia and Hypnea, and in eutrophic estuary by opportunistic chlorophytes (68%), especially Chaetomorpha and Ulva. Prevalence and biomass of drift were far greater in the eutrophic estuary, particularly during summer and autumn when macroalgal growth rose sharply. Macroalgal biomass in the eutrophic estuary was positively related to salinity. These results facilitate predictions of how climatic and other anthropogenic changes influence extent of macroalgal growth and thus change the estuarine environment.
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Affiliation(s)
- Ian C Potter
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch 6150, Western Australia, Australia; Department of Primary Industries and Regional Development, Post Office Box 20, North Beach 6920, Western Australia, Australia
| | - Thomas H Rose
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch 6150, Western Australia, Australia; Ecoscope-epc, 20 Carlisle Street, Shoalwater 6169, Western Australia, Australia
| | - John M Huisman
- Western Australian Herbarium, Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions, Locked Bag 104, Bentley Delivery Centre, 6983, Western Australia, Australia
| | - Norman G Hall
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch 6150, Western Australia, Australia; Department of Primary Industries and Regional Development, Post Office Box 20, North Beach 6920, Western Australia, Australia
| | - Ainslie Denham
- Department of Primary Industries and Regional Development, Post Office Box 20, North Beach 6920, Western Australia, Australia
| | - James R Tweedley
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch 6150, Western Australia, Australia; Environmental and Conservation Sciences, College of Science, Health, Engineering & Education, Murdoch University, South Street, Murdoch 6150, Western Australia, Australia.
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Rose TH, Tweedley JR, Warwick RM, Potter IC. Zooplankton dynamics in a highly eutrophic microtidal estuary. MARINE POLLUTION BULLETIN 2019; 142:433-451. [PMID: 31232322 DOI: 10.1016/j.marpolbul.2019.03.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/20/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Mesozooplankton was sampled seasonally in a large microtidal estuary (Peel-Harvey) suffering from massive macroalgal growths and cyanobacterial blooms. Comparisons with other estuaries indicate that eutrophication led to copepod abundance declining and macroalgal-associated species increasing. Mesozooplankton species are almost exclusively autochthonous, i.e. spend entire life cycle within the estuary. Meroplanktonic species are virtually absent because main benthic macroinvertebrate species undergo direct benthic rather than planktotrophic development. There are also few abundant holoplanktonic species. Most species are tychoplanktonic, i.e. benthic and transported into plankton through physical disturbance of sediment. Species number, concentration and Simpson's Index are greater during night than day. Annual cyclical changes in species composition are related closely to changes in salinity. At the most degraded site, nematode concentrations were high and the species number and concentration changed markedly during extreme eutrophication, when oxygen concentrations were low, disrupting annual cyclical changes in species composition.
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Affiliation(s)
- Thomas H Rose
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch, Western Australia 6150, Australia
| | - James R Tweedley
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch, Western Australia 6150, Australia; Environment and Conservation Sciences, Murdoch University, 90 South St, Murdoch, Western Australia 6150, Australia.
| | - Richard M Warwick
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch, Western Australia 6150, Australia; Plymouth Marine Laboratory, Prospect Place, West Hoe, Plymouth PL13DH, United Kingdom
| | - Ian C Potter
- Centre for Sustainable Aquatic Ecosystems, Harry Butler Institute, Murdoch University, 90 South St, Murdoch, Western Australia 6150, Australia
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Sprogis KR, Christiansen F, Wandres M, Bejder L. El Niño Southern Oscillation influences the abundance and movements of a marine top predator in coastal waters. GLOBAL CHANGE BIOLOGY 2018; 24:1085-1096. [PMID: 28988470 DOI: 10.1111/gcb.13892] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/29/2017] [Indexed: 06/07/2023]
Abstract
Large-scale climate modes such as El Niño Southern Oscillation (ENSO) influence population dynamics in many species, including marine top predators. However, few quantitative studies have investigated the influence of large-scale variability on resident marine top predator populations. We examined the effect of climate variability on the abundance and temporary emigration of a resident bottlenose dolphin (Tursiops aduncus) population off Bunbury, Western Australia (WA). This population has been studied intensively over six consecutive years (2007-2013), yielding a robust dataset that captures seasonal variations in both abundance and movement patterns. In WA, ENSO affects the strength of the Leeuwin Current (LC), the dominant oceanographic feature in the region. The strength and variability of the LC affects marine ecosystems and distribution of top predator prey. We investigated the relationship between dolphin abundance and ENSO, Southern Annular Mode, austral season, rainfall, sea surface salinity and sea surface temperature (SST). Linear models indicated that dolphin abundance was significantly affected by ENSO, and that the magnitude of the effect was dependent upon season. Dolphin abundance was lowest during winter 2009, when dolphins had high temporary emigration rates out of the study area. This coincided with the single El Niño event that occurred throughout the study period. Coupled with this event, there was a negative anomaly in SST and an above average rainfall. These conditions may have affected the distribution of dolphin prey, resulting in the temporary emigration of dolphins out of the study area in search of adequate prey. This study demonstrated the local effects of large-scale climatic variations on the short-term response of a resident, coastal delphinid species. With a projected global increase in frequency and intensity of extreme climatic events, resident marine top predators may not only have to contend with increasing coastal anthropogenic activities, but also have to adapt to large-scale climatic changes.
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Affiliation(s)
- Kate R Sprogis
- Cetacean Research Unit, School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Fredrik Christiansen
- Cetacean Research Unit, School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Moritz Wandres
- School of Civil, Environmental and Mining Engineering and the UWA Oceans Institute, The University of Western Australia, Crawley, WA, Australia
| | - Lars Bejder
- Cetacean Research Unit, School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
- Marine Mammal Research Program, Hawaii Institute of Marine Biology, University of Hawaii, Hawaii, HI, USA
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Tweedley J, Warwick R, Potter I. The Contrasting Ecology of Temperate Macrotidal and Microtidal Estuaries. OCEANOGRAPHY AND MARINE BIOLOGY - AN ANNUAL REVIEW 2016. [DOI: 10.1201/9781315368597-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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