Characterizing Growing Season Length of Subtropical Coniferous Forests with a Phenological Model

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dc.contributor.authorGong, Yuan
dc.contributor.authorStaudhammer, Christina L.
dc.contributor.authorWiesner, Susanne
dc.contributor.authorStarr, Gregory
dc.contributor.authorZhang, Yinlong
dc.contributor.otherNanjing Forestry University
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherUniversity of Wisconsin System
dc.contributor.otherUniversity of Wisconsin Madison
dc.date.accessioned2021-08-25T20:36:09Z
dc.date.available2021-08-25T20:36:09Z
dc.date.issued2021
dc.description.abstractUnderstanding plant phenological change is of great concern in the context of global climate change. Phenological models can aid in understanding and predicting growing season changes and can be parameterized with gross primary production (GPP) estimated using the eddy covariance (EC) technique. This study used nine years of EC-derived GPP data from three mature subtropical longleaf pine forests in the southeastern United States with differing soil water holding capacity in combination with site-specific micrometeorological data to parameterize a photosynthesis-based phenological model. We evaluated how weather conditions and prescribed fire led to variation in the ecosystem phenological processes. The results suggest that soil water availability had an effect on phenology, and greater soil water availability was associated with a longer growing season (LOS). We also observed that prescribed fire, a common forest management activity in the region, had a limited impact on phenological processes. Dormant season fire had no significant effect on phenological processes by site, but we observed differences in the start of the growing season (SOS) between fire and non-fire years. Fire delayed SOS by 10 d +/- 5 d (SE), and this effect was greater with higher soil water availability, extending SOS by 18 d on average. Fire was also associated with increased sensitivity of spring phenology to radiation and air temperature. We found that interannual climate change and periodic weather anomalies (flood, short-term drought, and long-term drought), controlled annual ecosystem phenological processes more than prescribed fire. When water availability increased following short-term summer drought, the growing season was extended. With future climate change, subtropical areas of the Southeastern US are expected to experience more frequent short-term droughts, which could shorten the region's growing season and lead to a reduction in the longleaf pine ecosystem's carbon sequestration capacity.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationGong, Y., Staudhammer, C., Wiesner, S., Starr, G., Zhang, Y. (2021): Characterizing Growing Season Length of Subtropical Coniferous Forests with a Phenological Model. Forests. 12(1).
dc.identifier.doi10.3390/f12010095
dc.identifier.orcidhttps://orcid.org/0000-0002-7918-242X
dc.identifier.orcidhttps://orcid.org/0000-0003-1887-418X
dc.identifier.orcidhttps://orcid.org/0000-0002-1338-2939
dc.identifier.orcidhttps://orcid.org/0000-0001-7232-0458
dc.identifier.urihttp://ir.ua.edu/handle/123456789/8063
dc.languageEnglish
dc.language.isoen_US
dc.publisherMDPI
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectecosystem physiology
dc.subjecteddy covariance
dc.subjectgross primary production
dc.subjectlongleaf pine
dc.subjectphenology
dc.subjectprescribed fire
dc.subjectLAND-SURFACE PHENOLOGY
dc.subjectCARBON UPTAKE
dc.subjectCO2 FLUX
dc.subjectRESEARCH PROGRESS
dc.subjectPINE FOREST
dc.subjectWATER-USE
dc.subjectVEGETATION
dc.subjectECOSYSTEM
dc.subjectCLIMATE
dc.subjectTEMPERATE
dc.subjectForestry
dc.titleCharacterizing Growing Season Length of Subtropical Coniferous Forests with a Phenological Modelen_US
dc.typetext
dc.typeArticle
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