scholarly journals Spring and autumn phenologySpring and autumn phenology in an understory herb are uncorrelated and driven by different factors

2021 ◽  
Author(s):  
Elsa Fogelström ◽  
Giulia Zacchello ◽  
Daniela Guasconi ◽  
Johan P. Dahlgren ◽  
Johan Ehrlén
Keyword(s):  
Understory Herb

scholarly journals Effect of thinning intensity on understory herbaceous diversity and biomass in mixed coniferous and broad-leaved forests of Changbai Mountain

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Gerong Wang ◽  
Yue Sun ◽  
Mo Zhou ◽  
Naiqian Guan ◽  
Yuwen Wang ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Mixed Forest ◽  
Growing Season ◽  
Total Biomass ◽  
Herb Layer ◽  
Simpson Index ◽  
Thinning Intensity ◽  
Ground Biomass ◽  
Below Ground ◽  
Understory Herb

Abstract Background Herbs are an important part of the forest ecosystem, and their diversity and biomass can reflect the restoration of vegetation after forest thinning disturbances. Based on the near-mature secondary coniferous and broad-leaved mixed forest in Jilin Province Forestry Experimental Zone, this study analyzed seasonal changes of species diversity and biomass of the understory herb layer after different intensities of thinning. Results The results showed that although the composition of herbaceous species and the ranking of importance values were affected by thinning intensity, they were mainly determined by seasonal changes. Across the entire growing season, the species with the highest importance values in thinning treatments included Carex pilosa, Aegopodium alpestre, Meehania urticifolia, and Filipendula palmata, which dominated the herb layer of the coniferous and broad-leaved mixed forest. The number of species, Margalef index, Shannon-Wiener index and Simpson index all had their highest values in May, and gradually decreased with months. Pielou index was roughly inverted “N” throughout the growing season. Thinning did not increase the species diversity. Thinning can promote the total biomass, above- and below-ground biomass. The number of plants per unit area and coverage were related to the total biomass, above- and below-ground biomass. The average height had a significantly positive correlation with herb biomass in May but not in July. However, it exerted a significantly negative correlation with herb biomass in September. The biomass in the same month increased with increasing thinning intensity. Total herb biomass, above- and below-ground biomass showed positive correlations with Shannon-Winner index, Simpson index and Pielou evenness index in May. Conclusions Thinning mainly changed the light environment in the forest, which would improve the plant diversity and biomass of herb layer in a short time. And different thinning intensity had different effects on the diversity of understory herb layer. The findings provide theoretical basis and reference for reasonable thinning and tending in coniferous and broad-leaved mixed forests.

Multiple-scale assessment of understory herb species diversity in pine plantations after long-term restoration

2013 ◽  
Vol 32 (5) ◽  
pp. 680-688 ◽  
Author(s):  
Shi-Xiong Wang ◽  
Hua Guo ◽  
Xiao-An Wang ◽  
Wei-Yi Fan ◽  
Ren-Yan Duan
Keyword(s):  
Species Diversity ◽  
Multiple Scale ◽  
Pine Plantations ◽  
Scale Assessment ◽  
Understory Herb ◽  
Herb Species

Ontogenetic stage, plant vigor and sex mediate herbivory loads in a dioecious understory herb

2017 ◽  
Vol 85 ◽  
pp. 184-190
Author(s):  
Sara Selaković ◽  
Vukica Vujić ◽  
Nemanja Stanisavljević ◽  
Živko Jovanović ◽  
Svetlana Radović ◽  
...  
Keyword(s):  
Ontogenetic Stage ◽  
Plant Vigor ◽  
Understory Herb

The compensatory responses of an understory herb to experimental damage are habitat-dependent

2005 ◽  
Vol 92 (12) ◽  
pp. 2101-2106 ◽  
Author(s):  
Emilio M. Bruna ◽  
Maria Beatriz Nogueira Ribeiro
Keyword(s):  
Compensatory Responses ◽  
Understory Herb

Agricultural land-use history does not reduce woodland understory herb establishment

Oecologia ◽  
2019 ◽  
Vol 189 (4) ◽  
pp. 1049-1060 ◽  
Author(s):  
Carrie A. Barker ◽  
Nash E. Turley ◽  
John L. Orrock ◽  
Joseph A. Ledvina ◽  
Lars A. Brudvig
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Agricultural Land Use ◽  
Land Use History ◽  
Understory Herb

scholarly journals Understory herb layer exerts strong controls on soil microbial communities in subtropical plantations

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Kai Yin ◽  
Lei Zhang ◽  
Dima Chen ◽  
Yichen Tian ◽  
Feifei Zhang ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Soil Microbial Communities ◽  
Herb Layer ◽  
Soil Microbial ◽  
Understory Herb

Effects of conifer basal area on understory herb presence, abundance, and flowering in a second-growth Douglas-fir forest

2005 ◽  
Vol 35 (4) ◽  
pp. 938-948 ◽  
Author(s):  
Briana C Lindh
Keyword(s):  
Regression Tree ◽  
Basal Area ◽  
Slope Aspect ◽  
Individual Species ◽  
Forest Species ◽  
Stream Channels ◽  
Competitive Effects ◽  
Second Growth ◽  
Understory Herb ◽  
Herb Species

Although overstory trees exert competitive effects on understory plants, it is not clear how this competition affects the distribution and performance of herb species. This study seeks to clarify the relationship between understory herb performance and overstory basal area in second-growth Pseudotsuga menziesii (Mirb.) Franco stands. Data on 11 understory herb species were collected in a 100-ha watershed. Statistical models were constructed to control for the effects of slope, aspect, soil type, and distance from the central stream or peripheral ridge lines. Presence of old-growth associated and forest generalist herbs was positively associated with conifer basal area, as well as with north-facing aspects and proximity to the stream channel. Presence of release herbs, subordinate forest species that respond positively to canopy disturbance, was largely independent of measured variables. Abundance of individual species showed weak and inconsistent relationships with conifer basal area. In contrast, flowering of almost all species was negatively related to conifer basal area. Regression tree models suggested that conifer basal area may have stronger negative effects farther from the moist environments along stream channels. I conclude that patterns of presence of slow-growing forest species may be determined primarily by past events, while flowering better reflects current stand conditions.

Growth of an understory herb is chronically reduced in Amazonian forest fragments

2011 ◽  
Vol 144 (2) ◽  
pp. 830-835 ◽  
Author(s):  
Paul R. Gagnon ◽  
Emilio M. Bruna ◽  
Paulo Rubim ◽  
Maria Rosa Darrigo ◽  
Ramon C. Littell ◽  
...  
Keyword(s):  
Forest Fragments ◽  
Amazonian Forest ◽  
Understory Herb
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