Biophysical characteristics of a morphologically-complex macrotidal tropical coastal system during a dry season

Jones, Nicole L.; Patten, Nicole L.; Krikke, D.L.; Lowe, Ryan J.; Waite, Anya M.; Ivey, Gregory

doi:10.1016/j.ecss.2014.07.018

Cited by 11 publications

(12 citation statements)

References 63 publications

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“…In our study, smaller phytoplankton (< 5 μm) comprised only ∼ 45% of total Chl a in the vicinity of Tallon reef (Fig. a,b), which is similar to what has been found in shallow macrotidal waters such as the northern GBR and Torres Strait (Furnas and Carpenter ) and inshore Kimberley waters (Thompson and Bonham ; Jones et al ). Previous work has suggested that the prevalence of larger suspended particles containing Chl a in the coastal Kimberley is due to particle flocculation (Jones et al ), which is enhanced in the presence of suspended silt/clays (Deng et al ) and strong vertical mixing (Wolanski and Spagnol ).…”

Section: Discussionsupporting

confidence: 89%

“…Assuming a photosynthetic quotient of 1 (Kinsey 1985), gross and net production for Tallon reef platform (mean of seagrass and macroalgal communities) was 500 mmol C m 22 d 21 and 30 mmol C m 22 d 21 , respectively, during the Apr experiment (Gruber et al 2017). Thus, benthic fluxes of POC p (Table 3) were < 1% of gross production, but were also much lower (< 15%) than rates of net production, unlike many previous studies.…”

Section: Benthic Fluxes Of Chl a And Phytoplankton-derived Nutrientsmentioning

confidence: 62%

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Benthic uptake of phytoplankton and ocean‐reef exchange of particulate nutrients on a tide‐dominated reef

Gruber

Lowe

Falter

2018

Limnology & Oceanography

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Benthic fluxes of chlorophyll a (Chl a) and particulate organic carbon (POC) and nitrogen (PON) were quantified on Tallon reef, a strongly tide-dominated (spring range > 8 m) reef located in the Kimberley region of northwestern Australia, over a 2-week period. Extensive hydrodynamic observations were used to construct a reef-scale mass balance to estimate material exchange between the reef and ocean over individual tidal cycles. Additionally, a one-dimensional control volume approach was used to estimate fluxes of Chl a in waters traversing the reef platform. Particulate material was delivered to the reef platform in a pulse during flood tide, and benthic uptake of Chl a declined to negligible values toward the end of ebb tide. On the scale of tidal cycles, a net uptake of Chl a was observed on the reef platform (on average 1.3 mg Chl a m 22 d 21), which was lower than previous studies of many reef communities. Fluxes showed variability depending on the magnitude of individual tidal cycles, which was likely related to volumes of oceanic Chl a inputs. Tallon reef was a net source of detrital POC and PON to the surrounding coastal ocean, with average POC

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Section: Discussionsupporting

confidence: 89%

Section: Benthic Fluxes Of Chl a And Phytoplankton-derived Nutrientsmentioning

confidence: 62%

Benthic uptake of phytoplankton and ocean‐reef exchange of particulate nutrients on a tide‐dominated reef

Gruber

Lowe

Falter

2018

Limnology & Oceanography

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“…Regions inshore of reef and island matrices are isolated by varying degrees from adjoining offshore oceanic waters, potentially leading to localized physical and biogeochemical processes and to large variations in the function of planktonic ecosystems over small spatial areas (Jones et al, 2014). Control of HABs in these types of systems, therefore, depends on information of adequately fine scale and resolution in order to determine the influence of the complex morphologies on water mass properties.…”

Section: Introductionmentioning

confidence: 99%

Toward connecting subtropical algal blooms to freshwater nutrient sources using a long-term, spatially distributed, in situ chlorophyll-a record

Blakey

Melesse

Rousseaux

2015

CATENA

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“…The Kimberley region, located along Australia's north-west coast (Fig. 1) represents a unique tropical marine system over a wide continental shelf that is influenced by large-amplitude, semi-diurnal barotropic tides (> 10 m spring tide); the second largest tidal range in the world (Holloway, 1983;Cresswell and Badcock, 2000;Condie and Andrewartha, 2008;Jones et al, 2014;Lowe et al, 2015). Circulation in this region is a complex interaction between tides, wind and regional forcing by large-scale currents at the shelf break (Brink et al, 2007;Condie and Andrewartha, 2008;Hood et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Structuring of larval fish assemblages along a coastal-oceanic gradient in the macro-tidal, tropical Eastern Indian Ocean

Beckley

Holliday

Sutton

et al. 2019

Deep Sea Research Part II: Topical Studies in Oceanography

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In the eastern Indian Ocean, the Kimberley region off northwestern Australia is characterised by a wide continental shelf, complex coastal topography and very large tides (>10 m). Diversity of fishes is high although little is known about the distribution of their larvae in this dynamic region. This study investigated spatial variation in ichthyoplankton assemblages along four coastal-oceanic transects and related the results to tidal cycles and other environmental variables. Larvae representing 92 neritic and 21 mesopelagic teleost families were collected; this far exceeds the diversity described for other comparable tropical continental shelf and oceanic systems. Distinct ichthyoplankton assemblages characterised inner shelf (Engraulidae and Gobiidae were dominant families), outer shelf / slope (mixed neritic and mesopelagic taxa) and oceanic waters (mesopelagic taxa, particularly Myctophidae, Gonostomatidae and Phosichthyidae), and were correlated with changes in environmental variables (water depth, seawater density, mixed layer depth and zooplankton). The spring-neap tidal cycle and subsequent tides (same stations sampled 12 h apart) had no significant influence on larval fish assemblages. Coastal waters were delineated by a density front and larval fish assemblages were significantly different from offshore assemblages. This study provides new insights into the pelagic ecosystem in the tropical eastern Indian Ocean and contributes to the understanding of the role of environmental variables and physical forcing in the structuring of larval fish assemblages.

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Biophysical characteristics of a morphologically-complex macrotidal tropical coastal system during a dry season

Cited by 11 publications

References 63 publications

Benthic uptake of phytoplankton and ocean‐reef exchange of particulate nutrients on a tide‐dominated reef

Benthic uptake of phytoplankton and ocean‐reef exchange of particulate nutrients on a tide‐dominated reef

Toward connecting subtropical algal blooms to freshwater nutrient sources using a long-term, spatially distributed, in situ chlorophyll-a record

Structuring of larval fish assemblages along a coastal-oceanic gradient in the macro-tidal, tropical Eastern Indian Ocean

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