Influence of legacy-tree retention on group-selection opening persistence

Klingsporn, Sarah; Webster, Christopher R.; Bump, Joseph K.

doi:10.1016/j.foreco.2012.08.034

Cited by 20 publications

(12 citation statements)

References 65 publications

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“…Since radial growth of gap-edge trees were related to the soil temperature in spring and the PAR in autumn (Tables 3, 4), the changed degree of microclimate may partly explain the varying effects of different GT intensities on the inter-and intra-annual growth. Large gaps had larger increases in temperature and more releases in light than small one meanwhile gap area of small gaps dramatically decreased with the lateral expending of gap-edge trees (Klingsporn et al 2012). Consequently, only large gap had significant influences on the radial growth.…”

Section: Discussionmentioning

confidence: 93%

“…Single-tree thinning usually simplifies stand structure (Neuendorff et al 2007). In contrast, group thinning by stimulating gap formation (i.e., gap-model thinning, GT) more effectively increases the spatial, temporal, and structural heterogeneity of forest landscapes (Klingsporn et al 2012). Many studies have proved the positive effects of GT on trees' growth, but there is still limited information about the inter-and intra-annual radial growth (earlywood and latewood) responses of remained trees after the thinning.…”

Section: Introductionmentioning

confidence: 99%

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Effects of gap-model thinning intensity on the radial growth of gap-edge trees with distinct crown classes in a spruce plantation

Zhao

Pang

Bao

et al. 2015

Trees

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Key message Radial growth responses of gap-edge trees to GT intensity greatly depends on microclimate condition (soil temperature and PAR) within gaps and their abilities in competing and utilizing the limited resources. Abstract Gap-model thinning (GT) is an effective management technique to improve the productivity of dense monoculture plantation. However, how GT intensity influence inter-and intra-annual radial growth of the gapedge trees remains an open question. In order to explore this question, we implemented an experiment with four treatments (control and gap sizes of 74, 109, and 196 m 2 ) in a 30-year-old spruce (Picea asperata) plantation in 2008. We used dendrochronological method to explore dynamic of the basal area increment (BAI) of gap-edge trees (n = 127) from 2009 to 2012 after GT treatments. We found that effects of GT on the BAI of gap-edge trees highly depended on GT intensity and their crown classes. The large gaps significantly increased the BAI of gap-edge trees and further the latewood growth responded more sensitively than the earlywood, whereas the influences of the small and intermediate gaps were weak; the large gaps effectively improved the BAI of the dominant trees, following by the intermediate, but not for the suppressed trees. Our results also displayed that the earlywood increment was strongly related to the soil temperature in spring and the latewood formation was influenced by the photosynthetically active radiation in autumn. It was eventually concluded that dynamic radial growth of gap-edge trees were driven by the improved microclimate caused by GT and their abilities in competing and utilizing resources. The present study highlights the importance of setting appropriate GT intensity and choosing the felled trees in GT operation.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Effects of gap-model thinning intensity on the radial growth of gap-edge trees with distinct crown classes in a spruce plantation

Zhao

Pang

Bao

et al. 2015

Trees

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“…The area of analysis in each group-selection opening was calculated as a convex hull using the sample points combined with the 2011 group-selection opening area (Klingsporn et al, 2012) to ensure the entire sampling area was included. Each opening was composed of a set of yellow birch and eastern hemlock stems (i.e., point processes) that were used to describe the spatial structure of the individual openings.…”

Section: Discussionmentioning

confidence: 99%

“…Group-selection opening and legacy-tree canopy area values were re-measured in 2011 (Klingsporn et al, 2012). Tree regeneration data was collected in twelve regeneration plots in each opening in 2005 and 2012 (Shields et al, 2007b;Poznanovic et al, 2013).…”

Section: Data Collectionmentioning

confidence: 99%

“…Gap border tree data (>8 cm diameter at breast height) was collected in 2004 as part of an initial study; the three border trees closest to the gap edge in the cardinal and sub-cardinal directions were tallied by species (Shields et al, 2007b). Group-selection opening and legacy-tree canopy area values were calculated from data collected in the fall of 2011 (Klingsporn et al, 2012).…”

Section: Data Collectionmentioning

confidence: 99%

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Spatial patterning of underrepresented tree species in canopy gaps 9 years after group selection cutting

Poznanovic

Webster

et al. 2014

Forest Ecology and Management

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Thinning‐induced canopy opening exerted a specific effect on soil nematode community

Yang

Pang

Bao

et al. 2018

Ecology and Evolution

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Changes in microclimate, soil physicochemical properties, understory vegetation cover, diversity, and composition as well as soil microbial community resulting from silvicultural practices are expected to alter soil food webs. Here, we investigated whether and how contrasting‐sized canopy openings affect soil nematode community within a 30 year‐aged spruce plantation. The results indicated that the responses of soil nematodes to canopy opening size were dependant on their feeding habit. The abundance of total nematodes and that of free‐living nematodes was negatively correlated with soil bulk density, whereas the abundance of omnivore–predators was negatively correlated with soil bulk density and shrubs cover, respectively. The ratio of the sum abundance of predators and omnivores to the plant parasites’ abundance, Simpson's dominance index, Pielou's evenness index, and sigma maturity index, maturity index (MI), MI 2‐5, basal index, enrichment index, and structure index was sensitive to alteration in canopy opening size. Multivariate analysis indicated that thinning‐induced gap size resulted in contrasting nematode assemblages. In conclusion, soil nematodes should be integrated as an indicator to monitor soil multifunctionality change due to thinning.

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Influence of legacy-tree retention on group-selection opening persistence

Cited by 20 publications

References 65 publications

Effects of gap-model thinning intensity on the radial growth of gap-edge trees with distinct crown classes in a spruce plantation

Effects of gap-model thinning intensity on the radial growth of gap-edge trees with distinct crown classes in a spruce plantation

Spatial patterning of underrepresented tree species in canopy gaps 9 years after group selection cutting

Thinning‐induced canopy opening exerted a specific effect on soil nematode community

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