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Environmental Effects on Normalized Gross Primary Productivity in Beech and Norway Spruce Forests

SYSNO ASEP	0548047
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Environmental Effects on Normalized Gross Primary Productivity in Beech and Norway Spruce Forests
Author(s)	Mensah, Caleb (UEK-B)_ORCID Šigut, Ladislav (UEK-B)_{RID, ORCID, SAI} Fischer, Milan (UEK-B)_{RID, ORCID, SAI} Foltýnová, Lenka (UEK-B)_{ORCID, SAI, RID} Jocher, Georg (UEK-B)_{SAI, ORCID, RID} Urban, Otmar (UEK-B)_{RID, ORCID, SAI} Wemegah, C.S. (GH) Nyantakyi, E.K. (GH) Chawla, Shilpy (UEK-B)_SAI Pavelka, Marian (UEK-B)_{RID, ORCID, SAI} Marek, Michal V. (UEK-B)_{RID, ORCID, SAI}
Number of authors	11
Article number	1128
Source Title	Atmosphere. - : MDPI Roč. 12, č. 9 (2021)
Number of pages	25 s.
Publication form	Print - P
Language	eng - English
Country	CH - Switzerland
Keywords	net ecosystem exchange ; eddy covariance technique ; soil respiration ; atmospheric demand ; drought ; water ; temperature ; co2 ; regeneration ; sensitivity ; eddy covariance ; European beech ; Norway spruce ; potential GPP ; normalized ; regression modeling
Subject RIV	EH - Ecology, Behaviour
OECD category	Ecology
R&D Projects	LM2018123 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
Research Infrastructure	CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i.
Method of publishing	Open access
Institutional support	UEK-B - RVO:86652079
UT WOS	000699427200001
EID SCOPUS	85114459863
DOI	10.3390/atmos12091128
Annotation	The strong effects of climate change are expected to negatively impact the long-term resilience and function of forest ecosystems, which could lead to changes in forest carbon balance and productivity. However, these forest responses may vary with local conditions and forest types. Accordingly, this study was carried out to determine gross primary productivity (GPP) sensitivity to changes in environmental parameters. Central European beech (at Stitna) and spruce species (at Bily Kriz and Rajec), growing under contrasting climatic conditions, were studied. The comparative analyses of GPP were based on a five-year-long dataset of eddy covariance fluxes during the main growing season (2012-2016). Results of forest GPP responses with changes in environmental factors from a traditional Stepwise multiple linear regression model (SMLR) were used and compared with Random forest (RF) analyses. To demonstrate how actual GPP trends compare to potential GPP (GPP(pot)) courses expected under near-optimal environmental conditions, we computed normalized GPP (GPP(norm)) with values between 0 and 1 as the ratio of the estimated daily sum of GPP to GPP(pot). The study confirmed the well-known effect of total intensity of the photosynthetically active radiation and its diffuse fraction on GPP(norm) across all the forest types. However, the study also showed the secondary effects of other environmental variables on forest productivity depending on the species and local climatic conditions. The reduction in forest productivity at the beech forest in Stitna was presumed to be mainly induced by edaphic drought (anisohydric behaviour). In contrast, reduced forest productivity at the spruce forest sites was presumably induced by both meteorological and hydrological drought events, especially at the moderately dry climate in Rajec. Overall, our analyses call for more studies on forest productivity across different forest types and contrasting climatic conditions, as this productivity is strongly dependent on species type and site-specific environmental conditions.
Workplace	Global Change Research Institute
Contact	Nikola Šviková, audesova.n@czechglobe.cz, Tel.: 511 192 268
Year of Publishing	2022
Electronic address	https://www.mdpi.com/2073-4433/12/9/1128

Number of the records: 1