Bioturbation potential of a macrofaunal community in Bohai Bay, northern China

Zhang, Qingtian; Li, Jing; Hu, Guikun; Zhang, Zhe

doi:10.1016/j.marpolbul.2019.01.063

Cited by 12 publications

(3 citation statements)

References 22 publications

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“…Also, previous field-based studies observed an increased bioturbation activity with higher (Milstead et al, 2007;Meserve, 1981;Tews et al, 2004;Wu et al, 2021;Ferro and Barquez, 2009) and lower vegetation cover (Simonetti, 1989;S. Zhang et al, 2020;Q. Zhang et al, 2019;Qin et al, 2021).…”

Section: Introductionmentioning

confidence: 69%

Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient

Grigusova,

Larsen,

Brandl

et al. 2023

Biogeosciences

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Abstract. Animal burrowing activity affects soil texture, bulk density, soil water content, and redistribution of nutrients. All of these parameters in turn influence sediment redistribution, which shapes the earth's surface. Hence it is important to include bioturbation into hillslope sediment transport models. However, the inclusion of burrowing animals into hillslope-wide models has thus far been limited and has largely omitted vertebrate bioturbators, which can be major agents of bioturbation, especially in drier areas. Here, we included vertebrate bioturbator burrows into a semi-empirical Morgan–Morgan–Finney soil erosion model to allow a general approach to the assessment of the impacts of bioturbation on sediment redistribution within four sites along the Chilean climate gradient. For this, we predicted the distribution of burrows by applying machine learning techniques in combination with remotely sensed data in the hillslope catchment. Then, we adjusted the spatial model parameters at predicted burrow locations based on field and laboratory measurements. We validated the model using field sediment fences. We estimated the impact of bioturbator burrows on surface processes. Lastly, we analyzed how the impact of bioturbation on sediment redistribution depends on the burrow structure, climate, topography, and adjacent vegetation. Including bioturbation greatly increased model performance and demonstrates the overall importance of vertebrate bioturbators in enhancing both sediment erosion and accumulation along hillslopes, though this impact is clearly staggered according to climatic conditions. Burrowing vertebrates increased sediment accumulation by 137.8 % ± 16.4 % in the arid zone (3.53 kg ha−1 yr−1 vs. 48.79 kg ha−1 yr−1), sediment erosion by 6.5 % ± 0.7 % in the semi-arid zone (129.16 kg ha−1 yr−1 vs. 122.05 kg ha−1 yr−1), and sediment erosion by 15.6 % ± 0.3 % in the Mediterranean zone (4602.69 kg ha−1 yr−1 vs. 3980.96 kg ha−1 yr−1). Bioturbating animals seem to play only a negligible role in the humid zone. Within all climate zones, bioturbation did not uniformly increase erosion or accumulation within the whole hillslope catchment. This depended on adjusting environmental parameters. Bioturbation increased erosion with increasing slope, sink connectivity, and topography ruggedness and decreasing vegetation cover and soil wetness. Bioturbation increased sediment accumulation with increasing surface roughness, soil wetness, and vegetation cover.

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Section: Introductionmentioning

confidence: 69%

Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient

Grigusova,

Larsen,

Brandl

et al. 2023

Biogeosciences

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“…Zhang et al (2019) found that few environmental variables had significant correlations with BPc values, and those correlations changed seasonally. Similarly, they found that total nitrogen exhibited a significant correlation with BPc values in spring (Zhang et al, 2019). These results were not consistent with our study, because, unlike the ocean, the upper, middle and downstream of the Weihe River differ in geographical characteristics, with the downstream part seriously affected by human activities.…”

Section: Discussionmentioning

confidence: 99%

“…Soissons et al (2019) showed that the impact of invertebrates on sediment dynamics is context dependent which is from the species under consideration, and the local prevailing environmental conditions, especially sediment properties (Soissons et al, 2019). Zhang et al (2019) found that few environmental variables had significant correlations with BPc values, and those correlations changed seasonally. Similarly, they found that total nitrogen exhibited a significant correlation with BPc values in spring (Zhang et al, 2019).…”

Section: Structural and Functional Variation Of Hyporheic Macroinvert...mentioning

confidence: 99%

Environmental context mediates the interaction between fine sediment and hyporheic macroinvertebrate

et al. 2021

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Excessive deposition of fine-sediment filling interstitial spaces in riverbed substrates is widely acknowledged to negatively impact the aquatic ecosystems. Hyporheic invertebrates, sensitive to ecological status, respond to the clogged substratum through more intense bioturbation. To better understand the interaction between hyporheic macroinvertebrates and fine sediment, a continuum of a naturally increasing fine-sediment content in the Weihe River was investigated through field sampling in four seasons. Nonmetric multidimensional scaling (NMDS) and cluster analysis were employed to assess the distribution and the homogeneity in the composition variation of macroinvertebrate assemblages. Canonical correspondence analysis (CCA) was performed to reveal the context-dependent relevance of bioturbation activity with bioturbation potential value. Our results suggest that the impact of finesediment clogging on community composition and bioturbation activity was seasonally dependent due to the variability of environmental factors, such as flood events and water quality. The highest abundance and bioturbation activity occurred at moderately clogged sampling sites, while reductions in richness and bioturbation activity were observed at heavily clogged sampling sites, and the samples collected at some of the heavily clogged sites downstream did not even contain macroinvertebrates.The results indicated that the interaction between organisms and fine sediments is limited due to the complexity of the benthic and hyporheic zone. The study highlights the feasibility of hyporheic macroinvertebrates as indicators for the effects of finesediment loading pressures on lotic ecosystems and the necessity of reach-specific conservation and management strategies, especially in the downstream.

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Source and composition of organic matter and its role in sediment benthic communities

Sinu

2022

Ecology and Biodiversity of Benthos

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Bioturbation potential of a macrofaunal community in Bohai Bay, northern China

Cited by 12 publications

References 22 publications

Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient

Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient

Environmental context mediates the interaction between fine sediment and hyporheic macroinvertebrate

Source and composition of organic matter and its role in sediment benthic communities

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