AI Article Synopsis
- The study examined how bed-cleaning sludge (BCS) from shrimp ponds affects the physiology of Kandelia obovata seedlings in mangrove forests.
- As sediment coverage thickness (SCT) increased from 0 to 8 cm, photosynthesis and related processes declined, particularly at 8 cm, while key physiological stress indicators worsened at 4 cm.
- The findings suggest that SCT levels below 4 cm are better for seedling health, while thicker sediments (up to 8 cm) introduce stress factors affecting growth and nutrition.
Article Abstract
Cumulative effect of bed-cleaning sludge (BCS) from shrimp ponds on the physiology of Kandelia obovata seedling were investigated. Based on the accumulation rate of BCS discharged from shrimp ponds in mangrove forests, four types of sediment coverage thicknesses (SCT) of 0, 2, 4, and 8 cm were set up. With the increases in SCTs, photosynthetic rate, stomatal conductance, transpiration rates were lowest in SCT8; intercellular CO concentrations were lowest in SCT4. Leaf superoxide dismutase and peroxidase activities rose and then fell with the increases in SCTs, and Leaf malonaldehyde contents significantly increased. However, contents of leaf free proline, soluble protein and soluble sugar were lowest for SCT4. Root activity was highest for SCT4. Leaves had high N contents, while roots had high P contents. Overall, as for physiological parameters of K. obovata seedlings, SCTs <4 cm were suitable and the values up to 8 cm formed some stresses.
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| http://dx.doi.org/10.1016/j.marpolbul.2024.117070 | DOI Listing |
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