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Pérez A, Escobedo R, Castro R, Jesus R, Cardich J, Romero PE, Salas-Gismondi R, Ochoa D, Aponte H, Sanders CJ, Carré M. Carbon and nutrient burial within Peruvian coastal marsh driven by anthropogenic activities. MARINE POLLUTION BULLETIN 2022; 181:113948. [PMID: 35863205 DOI: 10.1016/j.marpolbul.2022.113948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 07/07/2022] [Accepted: 07/09/2022] [Indexed: 06/15/2023]
Abstract
This research assessed carbon and nutrient burial during the past ~60 years within a Peruvian coastal marsh ecosystem affected by anthropogenic activities, by examining total organic carbon (TOC), total nitrogen (TN) and isotopes (δ13C and δ15N) tracers in two dated sediment cores. Significantly higher TOC and TN burial, up to 416.4 ± 65.0 and 0.7 ± 0.1 g m-2 year-1 respectively, were observed after an uncontrolled urban expansion starting in the early 1970's to the 1990's. The TOC and TN burial rates were up to twofold higher than those observed for preserved coastal marshes. Furthermore, the decreased δ13C values (-16.1 ± 0.6 ‰) and increasing δ15N values (+10.6 ± 2.6 ‰) indicate higher deposition of algal material and urban sewage during the same period. The higher burial rates during 1970's-1990's and reduced rates thereafter evidenced the role of coastal marsh ecosystems plays in sequestering carbon and nutrients.
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Affiliation(s)
- Alexander Pérez
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru; Departamento de Ingeniería, Facultad de Ciencias y Filosofía (FACIEN), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru.
| | - Rosario Escobedo
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Rodrigo Castro
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Rosa Jesus
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Jorge Cardich
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Pedro E Romero
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Rodolfo Salas-Gismondi
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Diana Ochoa
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru; Departamento de Ingeniería, Facultad de Ciencias y Filosofía (FACIEN), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru
| | - Héctor Aponte
- Universidad Científica del Sur, Coastal Ecosystems of Peru Research Group, Lima, Perú
| | - Christian J Sanders
- National Marine Science Centre, Faculty of Science and Engineering, Southern Cross University, Coffs Harbour, NSW 2450, Australia
| | - Matthieu Carré
- Laboratorios de Investigación y Desarrollo (LID), Facultad de Ciencias y Filosofía (FACIEN), Centro de Investigación Para el Desarrollo Integral y Sostenible (CIDIS), Universidad Peruana Cayetano Heredia, 15102 Lima, Peru; IPSL-LOCEAN Laboratory, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, Paris, France
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Carbon and Nitrogen Contents Driven by Organic Matter Source within Pichavaram Wetland Sediments. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2022. [DOI: 10.3390/jmse10010053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Differences in grain size, total organic carbon (OC), total nitrogen (TN), OC/TN ratios, and stable isotope (δ13C and δ15N) were assessed in sediments from areas covered by mangrove and saltmarsh vegetation within Pichavaram estuary (Southeast India). The mean percentage contents of silt and clays (70 vs. 19%), OC (5.7 vs. 2.0%), and TN (0.39 vs. 0.14%) were consistently higher in the mangrove as compared to those observed in the saltmarsh tidal zone. These differences may obey the higher deposition and retention of fine particles in the presence of a mangrove root system that may facilitate the accumulation and preservation of organic matter within these sedimentary systems. Further, higher OC and TN contents were associated to higher terrestrial or mangrove-derived organic matter contribution with lighter δ13C signatures (−26.0‰) in both sedimentary tidal zones, whereas lower OC and TN contents were associated to heavier δ13C signatures. This study is in agreement with previous studies which indicate that the presence of wetland vegetation may increase the carbon and nutrient storage capacity within estuarine ecosystems, highly relevant information for the establishment of further conservation strategies for blue carbon ecosystems at global scales.
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Alsaffar Z, Cúrdia J, Irigoien X, Carvalho S. Composition, uniqueness and connectivity across tropical coastal lagoon habitats in the Red Sea. BMC Ecol 2020; 20:61. [PMID: 33228627 PMCID: PMC7686702 DOI: 10.1186/s12898-020-00329-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 11/11/2020] [Indexed: 11/15/2022] Open
Abstract
Background Tropical habitats and their associated environmental characteristics play a critical role in shaping macroinvertebrate communities. Assessing patterns of diversity over space and time and investigating the factors that control and generate those patterns is critical for conservation efforts. However, these factors are still poorly understood in sub-tropical and tropical regions. The present study applied a combination of uni- and multivariate techniques to test whether patterns of biodiversity, composition, and structure of macrobenthic assemblages change across different lagoon habitats (two mangrove sites; two seagrass meadows with varying levels of vegetation cover; and an unvegetated subtidal area) and between seasons and years. Results In total, 4771 invertebrates were identified belonging to 272 operational taxonomic units (OTUs). We observed that macrobenthic lagoon assemblages are diverse, heterogeneous and that the most evident biological pattern was spatial rather than temporal. To investigate whether macrofaunal patterns within the lagoon habitats (mangrove, seagrass, unvegetated area) changed through the time, we analysed each habitat separately. The results showed high seasonal and inter-annual variability in the macrofaunal patterns. However, the seagrass beds that are characterized by variable vegetation cover, through time, showed comparatively higher stability (with the lowest values of inter-annual variability and a high number of resident taxa). These results support the theory that seagrass habitat complexity promotes diversity and density of macrobenthic assemblages. Despite the structural and functional importance of seagrass beds documented in this study, the results also highlighted the small-scale heterogeneity of tropical habitats that may serve as biodiversity repositories. Conclusions Comprehensive approaches at the “seascape” level are required for improved ecosystem management and to maintain connectivity patterns amongst habitats. This is particularly true along the Saudi Arabian coast of the Red Sea, which is currently experiencing rapid coastal development. Also, considering the high temporal variability (seasonal and inter-annual) of tropical shallow-water habitats, monitoring and management plans must include temporal scales.
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Affiliation(s)
- Zahra Alsaffar
- Red Sea Research Centre, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.,Chemistry Department, College of Science, King Saud University (KSU), Riyadh, P.O. Box 2455, 11451, Saudi Arabia
| | - João Cúrdia
- Red Sea Research Centre, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Xabier Irigoien
- Red Sea Research Centre, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.,AZTI - Marine Research, Herrera Kaia, Pasaia, 20100, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| | - Susana Carvalho
- Red Sea Research Centre, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
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