Dissolved organic carbon concentration of a natural water body and its relationship to water color in Central Kalimantan, Indonesia

Ishikawa, Toshiyuki; Trisliana,; Yurenfrie,; Ardianor,; Gumiri, Sulmin

doi:10.1007/s10201-006-0174-0

Cited by 14 publications

(14 citation statements)

References 9 publications

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“…As expected based on previous work (Belmar‐Lucero et al., ; Hutchings, , ) , Cape Race trout populations were highly differentiated for all 12 traits despite occupying a very small geographic scale. Phenotype–environment associations observed were consistent with theoretical expectations and previous works on stream fishes (Ishikawa & Gumiri, ; Kelley et al., ; McCormick et al., ; Pease et al., ; Riddell & Leggett, ), again suggesting that traits are under selection in all Cape Race populations despite their large spread in population size. However, many predicted associations were seen in females only.…”

Section: Discussionsupporting

confidence: 89%

The evolutionary consequences of habitat fragmentation: Body morphology and coloration differentiation among brook trout populations of varying size

Zastavniouk

Weir

Fraser

2017

Ecology and Evolution

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A reduction in population size due to habitat fragmentation can alter the relative roles of different evolutionary mechanisms in phenotypic trait differentiation. While deterministic (selection) and stochastic (genetic drift) mechanisms are expected to affect trait evolution, genetic drift may be more important than selection in small populations. We examined relationships between mature adult traits and ecological (abiotic and biotic) variables among 14 populations of brook trout. These naturally fragmented populations have shared ancestry but currently exhibit considerable variability in habitat characteristics and population size (49 < N c < 10,032; 3 < N b < 567). Body size, shape, and coloration differed among populations, with a tendency for more variation among small populations in both trait means and CV when compared to large populations. Phenotypic differences were more frequently and directly linked to habitat variation or operational sex ratio than to population size, suggesting that selection may overcome genetic drift at small population size. Phenotype–environment associations were also stronger in females than males, suggesting that natural selection due to abiotic conditions may act more strongly on females than males. Our results suggest that natural and sexual‐selective pressures on phenotypic traits change during the process of habitat fragmentation, and that these changes are largely contingent upon existing habitat conditions within isolated fragments. Our study provides an improved understanding of the ecological and evolutionary consequences of habitat fragmentation and lends insight into the ability of some small populations to respond to selection and environmental change.

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Section: Discussionsupporting

confidence: 89%

The evolutionary consequences of habitat fragmentation: Body morphology and coloration differentiation among brook trout populations of varying size

Zastavniouk

Weir

Fraser

2017

Ecology and Evolution

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“…Very few published data for both DOC and DON measurements are available for the Southeast Asia region. Available data from this region generally point toward elevated DOC concentrations, e.g., 420 to 4,200 M in the rivers of Borneo (22) and up to 2,000 M in the rivers of East Java (1) and 200 to 500 M for the mangrove ecosystem in Thailand (26). Our study confirmed this trend.…”

Section: Discussionmentioning

confidence: 99%

“…Dissolved organic carbon (DOC) concentration was calculated as the difference between total dissolved carbon and dissolved inorganic carbon (22). Total dissolved carbon was determined by the high-temperature catalytic oxidation method (680°C) using a TOC auto analyzer (Shimadzu TOC-VCPH; Japan) (36).…”

Section: Samplingmentioning

confidence: 99%

Temporal Variation of Bacterial Respiration and Growth Efficiency in Tropical Coastal Waters

Lee

Bong

Hii

2009

Appl Environ Microbiol

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We investigated the temporal variation of bacterial production, respiration, and growth efficiency in the tropical coastal waters of Peninsular Malaysia. We selected five stations including two estuaries and three coastal water stations. The temperature was relatively stable (averaging around 29.5°C), whereas salinity was more variable in the estuaries. We also measured dissolved organic carbon and nitrogen (DOC and DON, respectively) concentrations. DOC generally ranged from 100 to 900 M, whereas DON ranged from 0 to 32 M. Bacterial respiration ranged from 0.5 to 3.2 M O 2 h ؊1 , whereas bacterial production ranged from 0.05 to 0.51 M C h ؊1 . Bacterial growth efficiency was calculated as bacterial production/(bacterial production ؉ respiration), and ranged from 0.02 to 0.40. Multiple correlation analyses revealed that bacterial production was dependent upon primary production (r 2 ‫؍‬ 0.169, df ‫؍‬ 31, and P < 0.02) whereas bacterial respiration was dependent upon both substrate quality (i.e., DOC/DON ratio) (r 2 ‫؍‬ 0.137, df ‫؍‬ 32, and P ‫؍‬ 0.03) and temperature (r 2 ‫؍‬ 0.113, df ‫؍‬ 36, and P ‫؍‬ 0.04). Substrate quality was the most important factor (r 2 ‫؍‬ 0.119, df ‫؍‬ 33, and P ‫؍‬ 0.04) for the regulation of bacterial growth efficiency. Using bacterial growth efficiency values, the average bacterial carbon demand calculated was from 5.30 to 11.28 M C h ؊1 . When the bacterial carbon demand was compared with primary productivity, we found that net heterotrophy was established at only two stations. The ratio of bacterial carbon demand to net primary production correlated significantly with bacterial growth efficiency (r 2 ‫؍‬ 0.341, df ‫؍‬ 35, and P < 0.001). From nonlinear regression analysis, we found that net heterotrophy was established when bacterial growth efficiency was <0.08. Our study showed the extent of net heterotrophy in these waters and illustrated the importance of heterotrophic microbial processes in coastal aquatic food webs.As our understanding of the marine food web evolves, we recognize the importance of microorganisms in aquatic ecosystems. Bacteria are the main respirers and recycle a large pool of dissolved organic matter to higher trophic levels (6, 13). Therefore, bacterial production is a key process in dissolved organic matter flux. However, the transfer of dissolved organic matter to bacteria is more accurately reflected by bacterial carbon demand (BCD) or carbon consumption (23). One way to obtain BCD from bacterial production is through bacterial growth efficiency (BGE) or growth yield. BGE is an important parameter to evaluate the fate of organic carbon inputs and to determine whether bacteria act as a link (recyclers) or sink (mineralizers). Therefore, understanding the patterns of variation in BGE is fundamental for our knowledge of carbon cycling (14).BGE is essentially the ratio of carbon converted to biomass relative to all the carbon consumed, where carbon consumption is either measured as the sum of bacterial production and respiration (5, 24), dissolved organic ...

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“…10 The sampling strategy of both measurements is not further specified. 11 Ishikawa et al (2006) conducted water quality measurements during MayJune 2004 at the two rivers Kahayan and Rungan (5 locations) and one at the centre of surrounding oxbow and flooded lakes (10 locations). Hartoto (2010) conducted water quality measurements at 10 locations, and at these locations six sampling sessions were conducted between June 2003 to 28 November 2004.…”

Section: Discussionmentioning

confidence: 99%

“…and Eichhornia crassipes, Mimosa pigra and Polygonum barbatum) (Gonner 2000) may not only affect the water quality through the decomposition of the dead vegetation but also has consequences for the habitat of white-fish species, and eventually the more resilient black-fish species, by reducing the depth and the water flows of the lakes. (Ishikawa et al 2006) and the Lake Loa Kang Fishery Reserve (Hartoto 2010 The water quality parameters total suspended solids, pH and hydrogen sulphide differ significantly between the three lakes in 2006. Possible explanations include drainage from waterlogged peat areas and mining activities.…”

Section: Discussionmentioning

confidence: 99%

Changing Water Quality in the Middle Mahakam Lakes: Water Quality Trends in a Context of Rapid Deforestation, Mining and Palm Oil Plantation Development in Indonesia’s Middle Mahakam Wetlands

et al. 2015

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The degradation of Indonesia's wetlands is continuing at a rapid pace. People living in the Middle Mahakam Lakes (MML) region, part of a major wetland area in Indonesia, have observed various negative changes in their local environment, especially with regard to water quality. We verify these local perceptions with the support of water quality measurements (physical and chemical) taken in 1992-93, 1995, 1998 and 2006. We also aim to present data that can be used to determine future trends. We evaluated the water quality of the MML by comparing the 2006 measurements with data reported for similar water systems in Kalimantan and with water quality standards in the USA, and set by the World Bank, Australia, Malaysia and South Africa. Measurements show that the water quality of the MML improved considerably between 1998 and 2006 but there seems to be a delicate balance between the pH value and the levels of oxygen, nutrients and hydrogen sulphide. The low alkalinity values indicate that the system is prone to pH changes, which could be triggered by an increased input of acids, as a consequence of deforestation, mining activities or the drainage of peat lands, effects already occurring in one of the lakes.

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Dissolved organic carbon concentration of a natural water body and its relationship to water color in Central Kalimantan, Indonesia

Cited by 14 publications

References 9 publications

The evolutionary consequences of habitat fragmentation: Body morphology and coloration differentiation among brook trout populations of varying size

The evolutionary consequences of habitat fragmentation: Body morphology and coloration differentiation among brook trout populations of varying size

Temporal Variation of Bacterial Respiration and Growth Efficiency in Tropical Coastal Waters

Changing Water Quality in the Middle Mahakam Lakes: Water Quality Trends in a Context of Rapid Deforestation, Mining and Palm Oil Plantation Development in Indonesia’s Middle Mahakam Wetlands

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