Beta diversity of tropical marine benthic assemblages in the Spermonde Archipelago, Indonesia

Becking, Leontine E.; Cleary, Daniel F. R.; Voogd, Nicole J. de; Renema, Willem; Beer, Manon de; Soest, R.W.M. van; Hoeksema, Bert W.

doi:10.1111/j.1439-0485.2005.00051.x

Cited by 70 publications

(58 citation statements)

References 79 publications

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“…Previous studies report an on-offshore gradient in faunal assemblages across the Spermonde Archipelago (Cleary et al, 2005;Becking et al, 2006;Cleary and Renema, 2007;Hoeksema, 2012;Sawall et al, 2012). This may explain why P. Panambungan differs in its surface sediment composition in comparison to the outer reefs islands.…”

Section: Facies Patterns-geographical Variability or Phase Shifts In mentioning

confidence: 93%

Sediment Composition and Facies of Coral Reef Islands in the Spermonde Archipelago, Indonesia

et al. 2017

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Sedimentological and geomorphological characteristics of coral reef islands are strongly related to past and recent boundary conditions such as the hydrodynamic regime, wind directions, sea-level fluctuations, and the ecological footprint of the surrounding reef complexes. Alterations in the physical, chemical, and biological boundary controls may affect the stability of reef islands. Additionally, these factors are of importance in the context of future climate change. Such alterations through time may well be documented within the sedimentary record of reef islands and a better knowledge on its effects could help to improve our understanding of island responses to future changes of the status quo. However, detailed studies on the sedimentology and geomorphology of reef islands from southwest Sulawesi, Indonesia, are still rare. Here we report on the sedimentary composition and related facies zonation of four uninhabited coral reef islands in the Spermonde Archipelago. Sediment samples from onshore-and reef-flat environments were analyzed in regard to their grain size, component assemblages and facies distribution. Our results show that the analyzed island sediments are characterized by medium-to coarse-grained sand fractions and are well to poorly sorted. Across all islands examined, the surface sediment is predominately composed of materials identified as scleractinian coral and coralline red algae fragments, with minor additions from bivalves, gastropods and foraminifers. Importantly, statistical analyses of the variations in the percentage of these components allow for a clear sedimentary distinction of the four study sites into three outer shelf islands, situated closer to the open marine Makassar Strait, and one inner shelf island. On the inner shelf island, additional subsurface sedimentological analyses indicate a potential shift in major sediment contributors through time, preserved as coral-dominated accumulations within the subsurface samples, and coralline red algae-dominated deposits on top. These findings highlight the practical use of detailed sedimentological studies for the reconstruction of environmental changes in the Spermonde Archipelago.

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Section: Facies Patterns-geographical Variability or Phase Shifts In mentioning

confidence: 93%

Sediment Composition and Facies of Coral Reef Islands in the Spermonde Archipelago, Indonesia

et al. 2017

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“…The coral reef system of the Spermonde Archipelago has been the focus of extensive studies in the past two decades, serving as a model system to examine spatial differences in biodiversity, ecological and geological processes, and anthropogenic influences along a cross-shelf gradient within the Coral Triangle (Edinger et al, 1998;Renema and Troelstra, 2001;Cleary et al, 2005;Becking et al, 2006;Sawall et al, 2011Sawall et al, , 2013Hoeksema, 2012;Plass-Johnson et al, 2015a, 2016aPolonia et al, 2015). In this study, we go beyond previous research by identifying several important indicators of water quality and the main environmental drivers of coral reef community composition in the Spermonde Archipelago, including an assessment of temporal trends.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, offshore islands (>27 km) are rarely exposed to high levels of terrestrial effluents from the mainland. Benthic communities, sponges, and corals have shown strong on-to-offshore patterns in diversity (Edinger et al, 2000a;Cleary et al, 2005;Becking et al, 2006;de Voogd et al, 2006). Local island human populations rely heavily on nearby coral reefs (Ferse et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Patterns in Coral Reef Communities of the Spermonde Archipelago, 2012–2014, I: Comprehensive Reef Monitoring of Water and Benthic Indicators Reflect Changes in Reef Health

et al. 2018

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Pollution, fishing, and outbreaks of predators can heavily impact coastal coral reef ecosystems, leading to decreased water quality and benthic community shifts. To determine the main environmental drivers of coral reef status in the Spermonde Archipelago, Indonesia, we monitored environmental variables and coral reef benthic community structure along an on-to-offshore gradient annually from 2012 to 2014. Findings revealed that concentrations of phosphate, chlorophyll a-like fluorescence, suspended particulate matter, and light attenuation significantly decreased from on-to-offshore, while concentrations of dissolved O 2 and values of water pH significantly increased on-to-offshore. Nitrogen stable isotope signatures of sediment and an exemplary common brown alga were significantly enriched nearshore, identifying wastewater input from the city of Makassar as primary N source. In contrast to the high temporal variability in water quality, coral reef benthic community cover did not show strong temporal, but rather, spatial patterns. Turf algae was the dominant group next to live coral, and was negatively correlated to live coral, crustose coralline algae (CCA), rubble and hard substrate. Variation in benthic cover along the gradient was explained by water quality variables linked to trophic status and physico-chemical variables. As an integrated measure of reef status and structural complexity, the benthic index, based on the ratio of relative cover of live coral and CCA to other coral reef organisms, and reef rugosity were determined. The benthic index was consistently low nearshore and increased offshore, with high variability in the midshelf sites across years. Reef rugosity was also lowest nearshore and increased further offshore. Both indices dropped in 2013, increasing again in 2014, indicating a period of acute disturbance and recovery within the study and suggesting that the mid-shelf reefs are more resilient to disturbance than nearshore reefs. We thus recommend using these two indices with a selected number of environmental variables as an integral part of future reef monitoring.

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“…The majority of sponge species in the coastal bay mangrove habitat are common, widely distributed, and have been recorded in tropical sheltered bays, sandy reef flats, or coral reefs across Indonesia (e.g. Becking et al 2006, de Voogd & Cleary 2008, 2009). In contrast, a large portion of the species in the lakes was not known from any published records of the reefs; many are undescribed species and new to science.…”

Section: Differences Between Habitatsmentioning

confidence: 99%

Sponge species composition, abundance, and cover in marine lakes and coastal mangroves in Berau, Indonesia

Becking¹,

Cleary²,

Voogd³

2013

Mar. Ecol. Prog. Ser.

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We compared the species composition, abundance, and cover of sponges in 2 marine lakes (Kakaban Lake and Haji Buang Lake) and adjacent coastal mangroves on the islands of Kakaban and Maratua in the Berau region of Indonesia. We recorded a total of 115 sponge species, 33 of which were restricted to Kakaban Lake, 18 to Haji Buang Lake, and 30 to coastal mangroves on Maratua Island. Only 13 species were shared among all habitats. The 2 marine lakes are located 10 km apart, but their assemblages were more similar to each other than to the bay mangrove systems just 200 to 500 m away. Our results show that marine lakes represent a distinct habitat with significantly higher sponge cover and abundance as well as a markedly different species composition when compared with coastal mangroves. In both lake and coastal mangrove habitats there was a pronounced gradient in composition away from the shore with the primary difference between solid (root or rock) and soft substrate (mud or sand). Each substrate type harbored different sets of species in both lake and coastal mangrove habitats. There was no significant difference in sponge species composition, abundance, or cover between semi-permanent transects sampled in 2008 and 2009. We show for the first time that mangroves in the Indo-Pacific harbor a diverse array of sponge species and, further, that marine lakes harbor numerous unique species hitherto unknown to science.

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Beta diversity of tropical marine benthic assemblages in the Spermonde Archipelago, Indonesia

Cited by 70 publications

References 79 publications

Sediment Composition and Facies of Coral Reef Islands in the Spermonde Archipelago, Indonesia

Sediment Composition and Facies of Coral Reef Islands in the Spermonde Archipelago, Indonesia

Spatio-Temporal Patterns in Coral Reef Communities of the Spermonde Archipelago, 2012–2014, I: Comprehensive Reef Monitoring of Water and Benthic Indicators Reflect Changes in Reef Health

Sponge species composition, abundance, and cover in marine lakes and coastal mangroves in Berau, Indonesia

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