Dataset Information

A national-scale data set for dissolved carbon and its spatial pattern in lakes and reservoirs across China.

ABSTRACT: A dissolved carbon (DC) data set, including dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC), from 224 lakes (513 stations) and 141 large reservoirs (337 stations) across China is presented in this study. In addition to DC, the data set also includes results for electrical conductivity (EC), total phosphorus (TP), chlorophyll-a and transparency. The impact of trophic status and EC gradient on DC concentration in water bodies are discussed. Results from our investigation indicate that DC in saline (EC?>?1000 ?S cm-1) water bodies (mean?±?S.D, 297.13?±?356.14?mg?L-1, n?=?186) are much higher than those in fresh water bodies (79.55?±?199.34?mg?L-1, n?=?669). Similarly, eutrophic water bodies (n?=?552) exhibited higher DC concentrations than mesotrophic (n?=?215) and oligotrophic water bodies (n?=?85); DC in lakes (158.445?±?286.52?mg?L-1, n?=?513) was significantly higher than DC in reservoirs (37.83?±?37.53?mg?L-1, n?=?337). All data used in this investigation is accessible online.

SUBMITTER: Wen Z

PROVIDER: S-EPMC7062785 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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A national-scale data set for dissolved carbon and its spatial pattern in lakes and reservoirs across China.

Wen Zhidan Z Song Kaishan K Lyu Lili L Fang Chong C Shang Yingxin Y Liu Ge G Du Jia J

Scientific data 20200309 1

A dissolved carbon (DC) data set, including dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC), from 224 lakes (513 stations) and 141 large reservoirs (337 stations) across China is presented in this study. In addition to DC, the data set also includes results for electrical conductivity (EC), total phosphorus (TP), chlorophyll-a and transparency. The impact of trophic status and EC gradient on DC concentration in water bodies are discussed. Results from our investigation indica ...[more]

PMID: 32152284

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Project description:Resource availability constrains the life history strategies available to organisms and may thereby limit population growth rates and productivity. We used this conceptual framework to explore the mechanisms driving recently reported negative relationships between fish productivity and dissolved organic carbon (DOC) concentrations in lakes. We studied populations of bluegill (Lepomis macrochirus) in a set of lakes with DOC concentrations ranging from 3 to 24 mg/L; previous work has demonstrated that primary and secondary productivity of food webs is negatively related to DOC concentration across this gradient. For each population, we quantified individual growth rate, age at maturity, age-specific fecundity, maximum age, length-weight and length-egg size relationships, and other life history characteristics. We observed a strong negative relationship between maximum size and DOC concentration; for instance, fish reached masses of 150 to 260 g in low-DOC lakes but <120 g in high-DOC lakes. Relationships between fecundity and length, and between egg size and length, were constant across the DOC gradient. Because fish in high-DOC lakes reached smaller sizes but had similar fecundity and egg size at a given size, their total lifetime fecundity was as much as two orders of magnitude lower than fish in low-DOC lakes. High DOC concentrations appeared to constrain the range of bluegill life history strategies available; populations in high-DOC lakes always had low initial growth rates and high ages at maturity, whereas populations in low-DOC showed higher variability in these traits. This was also the case for the intrinsic rates of natural increase of these populations, which were always low at the high end of the DOC gradient. The potentially lower capacity for fish populations in high-DOC lakes to recover from exploitation has clear implications for the sustainable management of recreational fisheries in the face of considerable spatial heterogeneity and ongoing temporal change in lake DOC concentrations.

Dataset Information

A national-scale data set for dissolved carbon and its spatial pattern in lakes and reservoirs across China.

Publications

A national-scale data set for dissolved carbon and its spatial pattern in lakes and reservoirs across China.

Similar Datasets

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