Primary production of the kelp Lessonia corrugata varies with season and water motion: Implications for coastal carbon cycling.

Autor: Nardelli AE; Institute for Marine and Antarctic Studies (IMAS), Hobart, Tasmania, Australia., Visch W; Institute for Marine and Antarctic Studies (IMAS), Hobart, Tasmania, Australia., Farrington G; Institute for Marine and Antarctic Studies (IMAS), Hobart, Tasmania, Australia., Sanderson JC; Tassal Pty Ltd., Hobart, Tasmania, Australia., Bellgrove A; School of Life and Environmental Sciences, Deakin Marine Research and Innovation Centre, Deakin University, Warrnambool, Victoria, Australia., Wright JT; Institute for Marine and Antarctic Studies (IMAS), Hobart, Tasmania, Australia., Macleod C; Institute for Marine and Antarctic Studies (IMAS), Hobart, Tasmania, Australia., Hurd CL; Institute for Marine and Antarctic Studies (IMAS), Hobart, Tasmania, Australia.
Jazyk: angličtina
Zdroj: Journal of phycology [J Phycol] 2024 Feb; Vol. 60 (1), pp. 102-115. Date of Electronic Publication: 2023 Nov 15.
DOI: 10.1111/jpy.13408
Abstrakt: Kelp forests provide vital ecosystem services such as carbon storage and cycling, and understanding primary production dynamics regarding seasonal and spatial variations is essential. We conducted surveys at three sites in southeast Tasmania, Australia, that had different levels of water motion, across four seasons to determine seasonal primary production and carbon storage as living biomass for kelp beds of Lessonia corrugata (Order Laminariales). We quantified blade growth, erosion rates, and the variation in population density and estimated both the net biomass accumulation (NBA) per square meter and the carbon standing stock. We observed a significant difference in blade growth and erosion rates between seasons and sites. Spring had the highest growth rate (0.02 g C · blade -1 · d -1 ) and NBA (1.62 g C · m -2 · d -1 ), while summer had the highest blade erosion (0.01 g C · blade -1 · d -1 ), with a negative NBA (-1.18 g C · m -2 · d -1 ). Sites exhibiting lower blade erosion rates demonstrated notably greater NBA than sites with elevated erosion rates. The sites with the highest water motion had the slowest erosion rates. Moreover, the most wave-exposed site had the densest populations, resulting in the highest NBA and a greater standing stock. Our results reveal a strong seasonal and water motion influence on carbon dynamics in L. corrugata populations. This knowledge is important for understanding the dynamics of the carbon cycle in coastal regions.
(© 2023 The Authors. Journal of Phycology published by Wiley Periodicals LLC on behalf of Phycological Society of America.)
Databáze: MEDLINE
Externí odkaz: