Defining the sediment microbiome of the Indian River Lagoon, FL, USA, an Estuary of National Significance

AbstractThe Indian River Lagoon, located on the east coast of Florida, USA, is an Estuary of National Significance and an important economic and ecological resource. The Indian River Lagoon faces several environmental pressures, including freshwater discharges through the St. Lucie Estuary; accumulation of a anoxic, fine-grained, organic-rich sediment; and metal contamination from agriculture and marinas. Although the Indian River Lagoon has been well-studied, little is known about its microbial communities; thus, a two-year 16S amplicon sequencing study was conducted to assess the spatiotemporal changes of the sediment microbiome. In general, the Indian River Lagoon exhibited a microbiome that was consistent with other estuarine studies. Statistically different microbiomes were found between the Indian River Lagoon and St. Lucie Estuary due to changes in porewater salinity causing microbes that require salts for growth to be higher in the Indian River Lagoon. The St. Lucie Estuary exhibited more obvious microbial seasonality, such as higher Betaproteobacteriales, a freshwater associated organism, in wet season and higher Flavobacteriales in dry season samples. Distance-based linear models revealed these microbiomes were more affected by changes in total organic matter and copper than changes in temperature. Anaerobic organisms, such as Campylobacterales, were more associated with high total organic matter and copper samples while aerobic organisms, such as Nitrosopumilales, were more associated with low total organic matter and copper samples. This initial study fills the knowledge gap on the Indian River Lagoon microbiome and serves as an important baseline for possible future changes due to human impacts or environmental changes.

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KAJIAN KETERKAITAN ANTARA CADANGAN OKSIGEN DENGAN BEBAN BAHAN ORGANIK DI ZONA LAKUSTRIN DAN TRANSISI WADUK IR. H. DJUANDA

Jurnal Penelitian Perikanan Indonesia ◽

10.15578/jppi.14.1.2008.1-14 ◽

2017 ◽

Vol 14 (1) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Asmika H. Simarmata ◽

Enan M. Adiwilaga ◽

Bibiana W. Lay ◽

Tri Prartono

Keyword(s):

Organic Matter ◽

Oxygen Depletion ◽

Sampling Station ◽

Total Organic Matter ◽

Wet Season ◽

Chemical Laboratory ◽

Resources Management ◽

Aquatic Resources Management ◽

Department Faculty ◽

To Receive

Kematian massal ikan pada budi daya ikan dalam karamba jaring apung di Waduk Ir. H. Djuanda hampir selalu terjadi setiap tahun. Deplesi oksigen merupakan faktor yang mempengaruhi kondisi tersebut. Oleh karena itu, penelitian ini dilakukan. Tujuan penelitian ini adalah untuk mengkaji atau menentukan kemampuan perairan dalam menerima beban bahan organik. Penelitian dilakukan di Waduk Ir. H. Djuanda dari bulan Juni 2003 sampai dengan Mei 2004, dengan interval pengambilan contoh setiap bulan. Pengambilan contoh dilakukan di wilayah lakustrin yaitu stasiun L1, L2, dan L3 dan wilayah transisi stasiun T1, T2, dan T3. Pengambilan contoh vertikal meliputi permukaan, kedalaman 7, 15, 25, dan 35 m, dan dasar perairan. Metode dalam penelitian ini adalah survei post fakto. Analisis contoh dilakukan di laboratorium produktivitas perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor dan laboratorium kimia Loka Riset Pemacuan Stok Ikan, Jatiluhur. Parameter yang dianalisis adalah oksigen terlarut, bahan organik total, dan K2 (koefisien peluruhan), sedangkan parameter penunjang adalah suhu dan H2S. Hasil penelitian ini menunjukkan bahwa peningkatan bahan organik menyebabkan deplesi oksigen semakin tajam pada musim hujan di wilayah lakustrin. Konsentrasi bahan organik yang aman adalah 7,76 mg per l. Mass mortality of fishes at Ir. H. Djuanda Reservoir occurs almost every year. Oxygen depletion is one factor that affect the condition. There fore, this research should be done. The carrying capacity at Ir. H. Djuanda Reservoir to receive organic loading were determined in this study. The research conducted at Ir. H. Djuanda Reservoir from June 2003 until May 2004. Horizontal sampling station was conducted based on longitudinal gradient i.e. lacustrine zone (L1, L2, and L3), and transition zone (T1, T2, and T3). Vertical sampling points were at surface, at the depth of 7 m, 15, 25, 35, and 45 m, and at the bottom. Sample analysis carried out in physical chemical laboratory of Aquatic Resources Management Department, Faculty of Fisheries and Marine Science, IPB and chemical laboratory Loka Jatiluhur. The methods of this research were post facto survey descriptive. Dissolved oxygen, total organic matter, and BOD were observed during research.temperature and H2S were observed to support the study. The results showed that the increasing of organic matter cause the steep of oxygen depletion in transition of wet season at lacustrine zone. Acceptable concentration of total organic matter was 7.76 mg per l.

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Spatial and temporal shifts in the diet of the barnacle Amphibalanus eburneus within a subtropical estuary

PeerJ ◽

10.7717/peerj.5485 ◽

2018 ◽

Vol 6 ◽

pp. e5485 ◽

Cited By ~ 2

Author(s):

Christopher J. Freeman ◽

Dean S. Janiak ◽

Malcolm Mossop ◽

Richard Osman ◽

Valerie J. Paul

Keyword(s):

Organic Matter ◽

Feeding Strategy ◽

Benthic Communities ◽

Indian River Lagoon ◽

Anthropogenic Sources ◽

Surrounding Water ◽

Suspended Organic Matter ◽

Sessile Invertebrates ◽

Indian River ◽

Aureoumbra Lagunensis

The success of many sessile invertebrates in marine benthic communities is linked to their ability to efficiently remove suspended organic matter from the surrounding water column. To investigate the diet of the barnacle Amphibalanus eburneus, a dominant suspension feeder within the Indian River Lagoon (IRL) of central Florida, we compared the stable isotopes ratios (δ13C and δ15N) of barnacle tissue to those of particulate organic matter (POM). Collections were carried out quarterly for a year from 29 permanent sites and at sites impacted by an Aureoumbra lagunensis bloom. δ13C and δ15N values of Amphibalanus eburneus varied across sites, but δ15N was more stable over time. There was a range of δ15N values of Amphibalanus eburneus tissue from 6.0‰ to 10.5‰ across sites. Because land-based sources such as sewage are generally enriched in 15N, this suggests a continuum of anthropogenic influence across sites in the IRL. Over 70% of the variation in δ15N values of Amphibalanus eburneus across sites was driven by the δ15N values of POM, supporting a generalist feeding strategy on available sources of suspended organic matter. The dominance of this generalist consumer in the IRL may be linked to its ability to consume spatially and temporally variable food resources derived from natural and anthropogenic sources, as well as Aureoumbra lagunensis cells. Generalist consumers such as Amphibalanus eburneus serve an important ecological role in this ecosystem and act as a sentinel species and recorder of local, site-specific isotopic baselines.

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Defining the sediment prokaryotic communities of the Indian River Lagoon, FL, USA, an Estuary of National Significance

PLoS ONE ◽

10.1371/journal.pone.0236305 ◽

2020 ◽

Vol 15 (10) ◽

pp. e0236305

Author(s):

David J. Bradshaw ◽

Nicholas J. Dickens ◽

John H. Trefry ◽

Peter J. McCarthy

Keyword(s):

Indian River Lagoon ◽

Indian River ◽

National Significance

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SEDIMENT ARCHIVE OF SEAGRASS DYNAMICS IN NORTHERN INDIAN RIVER LAGOON, FL

10.1130/abs/2019se-326943 ◽

2019 ◽

Author(s):

Alexander Dombeck ◽

◽

Benjamin R. Tanner

Keyword(s):

Indian River Lagoon ◽

Indian River

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SHARING ORBITAL PERSPECTIVES OF EARTH THROUGH ASTRONAUT PHOTOGRAPHY TO EXPAND OUR UNDERSTANDING OF INTERLINKED EARTH SYSTEMS, ENVIRONMENTAL CHANGES, HUMAN IMPACTS AND OURSELVES

10.1130/abs/2020se-343506 ◽

2020 ◽

Author(s):

Joseph F. Reese ◽

Keyword(s):

Environmental Changes ◽

Human Impacts ◽

Earth Systems

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Dynamics of microcystins and saxitoxin in the Indian River Lagoon, Florida

Harmful Algae ◽

10.1016/j.hal.2021.102012 ◽

2021 ◽

Vol 103 ◽

pp. 102012

Author(s):

Abdiel E. Laureano-Rosario ◽

Malcolm McFarland ◽

David J. Bradshaw ◽

Jackie Metz ◽

Rachel A. Brewton ◽

...

Keyword(s):

Indian River Lagoon ◽

Indian River

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The intake and production of lactating Merino ewes and their lambs grazed at different stocking rates

Australian Journal of Agricultural Research ◽

10.1071/ar9770133 ◽

1977 ◽

Vol 28 (1) ◽

pp. 133 ◽

Cited By ~ 13

Author(s):

JP Langlands

Keyword(s):

Organic Matter ◽

Milk Production ◽

Metabolizable Energy ◽

Milk Consumption ◽

Total Organic Matter ◽

Stocking Rate ◽

Wool Production ◽

Maintenance Requirement ◽

Stocking Rates

Grass and milk consumption and liveweight changes of lambs grazed at stocking rates ranging from 9 to 35 sheep/ha were measured during a 105 day lactation. Grass consumption and wool production of their mothers and of similar ewes without lambs were also determined. The forage and total organic matter intakes of the lamb increased with time while milk consumption declined; all three variables were negatively correlated with stocking rate. The intake of the ewe and its liveweight gain were not sensitive to increasing stocking rate, but wool production declined at higher stocking rates. The maintenance requirement of the ewes was estimated to be 218 kJ metabolizable energy/kg liveweight, and the efficiency with which metabolizable energy was utilized for milk production was 66%. Lactation increased the intake of the ewe but reduced its wool production.

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Traces of sunlight in the organic matter biogeochemistry of two shallow subarctic lakes

Biogeochemistry ◽

10.1007/s10533-021-00820-9 ◽

2021 ◽

Author(s):

Marttiina V. Rantala ◽

Carsten Meyer-Jacob ◽

E. Henriikka Kivilä ◽

Tomi P. Luoto ◽

Antti. E. K. Ojala ◽

...

Keyword(s):

Organic Matter ◽

Organic Carbon ◽

Lake Sediments ◽

Lake Water ◽

Human Impacts ◽

Global Environmental Change ◽

Carbon Export ◽

Subarctic Lakes ◽

Carbon Regulation ◽

In Situ Experiments

AbstractGlobal environmental change alters the production, terrestrial export, and photodegradation of organic carbon in northern lakes. Sedimentary biogeochemical records can provide a unique means to understand the nature of these changes over long time scales, where observational data fall short. We deployed in situ experiments on two shallow subarctic lakes with contrasting light regimes; a clear tundra lake and a dark woodland lake, to first investigate the photochemical transformation of carbon and nitrogen elemental (C/N ratio) and isotope (δ13C, δ15N) composition in lake water particulate organic matter (POM) for downcore inferences. We then explored elemental, isotopic, and spectral (inferred lake water total organic carbon [TOC] and sediment chlorophyll a [CHLa]) fingerprints in the lake sediments to trace changes in aquatic production, terrestrial inputs and photodegradation before and after profound human impacts on the global carbon cycle prompted by industrialization. POM pool in both lakes displayed tentative evidence of UV photoreactivity, reflected as increasing δ13C and decreasing C/N values. Through time, the tundra lake sediments traced subtle shifts in primary production, while the woodland lake carried signals of changing terrestrial contributions, indicating shifts in terrestrial carbon export but possibly also photodegradation rates. Under global human impact, both lakes irrespective of their distinct carbon regimes displayed evidence of increased productivity but no conspicuous signs of increased terrestrial influence. Overall, sediment biogeochemistry can integrate a wealth of information on carbon regulation in northern lakes, while our results also point to the importance of considering the entire spectrum of photobiogeochemical fingerprints in sedimentary studies.

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