Seedling recruitment in response to artificial gaps: predicting the ecological consequence of forest disturbance

Zhang, Mingming; Yi, Xin

doi:10.1007/s11258-020-01089-y

Cited by 13 publications

(11 citation statements)

References 66 publications

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“…However, the results were contrary to the findings by Guo et al [23] who showed increased regeneration in medium gap sizes. The current study, however, showed that small gap sizes are crucial for regeneration of species in SW Mau contrary also to the findings by Zhang and Yi [27] who reported increase in regeneration with increase in gap size.…”

Section: Influence Of Gap Size On Regeneration Of Woody Vegetation Sp...contrasting

confidence: 99%

“…In addition, diversity in species showed variations in physiognomic appearance of the forest brought about by different techniques of species to acquire resources [30]. High seedling population in the small gap sizes was related to resource availability due to lack of interceptions from invasive species [27,28,31]. Moreover, small gap sizes recorded the lowest mean in tree diameter and height.…”

Section: Influence Of Gap Size On Forest Structurementioning

confidence: 99%

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Influence of Gap Size on Regeneration, Structure and Species Diversity of Woody Vegetation in a Secondary Montane Forest Reserve, Kenya

Ocholla

Obwoyere²,

Inoti³

2022

AJEE

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South-Western (SW) Mau forest reserve has been experiencing anthropogenic and natural disturbances creating canopy openings in the forest. The objective of this study was to determine how these canopy openings influence regeneration, forest structure and species diversity. The study employed nested sampling design in disturbed sites of the forest reserve. Plots of 500 by 500 m were laid once at 100 m inwards from the forest edge in the three blocks of SW Mau; Ndoinet, Maramara and Itare. Gaps were randomly identified in the plots and gap area calculated using Ellipse Method (EM). Gap sizes were categorized based on area (m2). Woody species surrounding the gaps were identified and names inventoried. To determine regeneration, two quadrats of 5 by 5 m and 1 by 1 m were randomly delineated in every gap size four times and eight times for saplings (1-3 m high) and seedlings (<1 m high), respectively. Tree heights surrounding the gaps were measured using suunto clinometer. Diameter at breast height (dbh) was measured using diameter caliper (65 cm for small trees) and diameter tape for large trees (dbh> 65 cm). A total of 41 gaps were identified with small gap sizes dominating (23). Kruskal-Wallis rank sum test indicated non-significant differences in regeneration, forest structure and species diversity in the three gap sizes. This was attributed to Piper capensis which invaded medium and large gap sizes creating a closed canopy. It was, therefore, concluded that canopy cover from the invasive species influenced woody vegetation parameters in the gap sizes. It is, therefore, recommended to clear the dense ground cover to allow better natural regeneration and also enrichment planting in the gaps.

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Section: Influence Of Gap Size On Regeneration Of Woody Vegetation Sp...contrasting

confidence: 99%

Section: Influence Of Gap Size On Forest Structurementioning

confidence: 99%

Influence of Gap Size on Regeneration, Structure and Species Diversity of Woody Vegetation in a Secondary Montane Forest Reserve, Kenya

Ocholla

Obwoyere²,

Inoti³

2022

AJEE

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“…In our study, herbivorous C. rufocanus with plant-based diets (e.g., seeds, roots and bark) showed a more clustered arrangement of their gut bacterial components despite with relative higher diverse microbiomes, suggesting that fiber-based diets may show less specificity in microbiome compositions. However, seed-based feeders T. sibiricus exhibited relatively low diversity microbiomes, possibly reflecting their seed hoarding behavior across the study areas ( Yi and Zhang, 2008 ; Zhang and Yi, 2021 ). Although the detailed information of diets was not clear for the four rodents, we are unable to rule out the possibility that differences in diet composition play a role in the assembly of gut microbiomes in Rodentia.…”

Section: Discussionmentioning

confidence: 99%

“…Mean annual air temperature varies between 3.9 and 5.4°C with the minimum of −37.6°C in January and the maximum of 36.5°C in July. The frost-free period lasts for 130 days on average, with early frosts occurring in October and late frosts in April ( Zhang and Yi, 2021 ). Similarly, the Dongfanghong Forestry Center is part of the north temperate zone monsoon region, with severe and long winters and short summers.…”

Section: Methodsmentioning

confidence: 99%

The influence of species identity and geographic locations on gut microbiota of small rodents

Wang

Zhang

et al. 2022

Front. Microbiol.

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Although the correlation between gut microbiota, species identity and geographic locations has long attracted the interest of scientists, to what extent species identity and geographic locations influence the gut microbiota assemblages in granivorous rodents needs further investigation. In this study, we performed a survey of gut microbial communities of four rodent species (Apodemus agrarius, A. peninsulae, Tamias sibiricus and Clethrionomys rufocanus) distributed in two areas with great distance (> 600 km apart), to assess if species identity dominates over geographic locations in shaping gut microbial profiles using 16S rRNA gene sequencing. We found that gut microbiota composition varied significantly across host species and was closely correlated with host genetics. We identified strong species identity effects on gut microbial composition, with a comparatively weaker signal of geographic provenance on the intestinal microbiota. Specifically, microbiota of one species was on average more similar to that of conspecifics living in separate sites than to members of a closely related species living in the same location. Our study suggests that both host genetics and geographical variations influence gut microbial diversity of four rodent species, which merits further investigation to reveal the patterns of phylogenetic correlation of gut microbial community assembly in mammals across multiple habitats.

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“…The influence of canopy shade versus open conditions on seedling establishment and forest regrowth is well established (Whitmore 1986, Brown and Whitmore 1992, Kobe et al 1995, Bentos et al 2020, Zhang and Yi 2020). Numerous studies have noted how different tree species possess distinct abilities to establish, grow and survive with and without canopy shade (Chazdon et al 1988, Clark et al 1996, Denslow and Guzman 2000, Kitajima et al 2005, Poorter 2005, Sheil et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Canopy openness modifies tree seedling distributions along a tropical forest elevation gradient

Mazón

Klanderud

Sheil

2022

Oikos

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In theory, canopy openings can influence tree species establishment and resulting distributions over environmental gradients, but evidence concerning the magnitude and direction of such effects remain scarce. In this study we examine how canopy openings influence seedling persistence and growth and resulting elevation range limits. We transplanted 1360 seedlings of eight woody species (trees Trichilia habanensis, Persea caerulea, Cedrela tonduzii, Cornus disciflora, Quercus salicifolia, Q. bumelioides, Q. costaricensis and the shrub Hypericum irazuense) under the forest canopy and in open areas with understorey vegetation removed in a replicated design along a 2900 m elevation gradient in Costa Rica. We recorded survival, stem diameter and height over 18 months. We used hierarchical generalized additive models to examine relationships of seedling survival and growth with elevation and treatment (inside forest versus open area). We found a clear effect of open versus forest conditions on survival across the elevation gradient for six species. Species planted into open areas with full light exposure survived 100–1000 m below (~ 0.5–5°C warmer), and in one case 300 m above (~ 1.8°C colder) their observed ranges. Above 2900 m, survival of all species was markedly greater under the forest canopy versus open sites, suggesting facilitation from the forest, as frost occurred in open areas above this elevation. The resulting upper range increased between 200 and 1160 m (~ 1–6°C colder) compared to their observed range. At lower elevations, severe insect herbivory occurred on some species likely influencing lower range limits. Open areas influenced how seedling survival and growth varied with elevation for all the studied species. All species survived and grew outside the elevation ranges where they are typically observed. We suggest that the influence of forest gaps and clearings over extended gradients offers novel insights into tree range dynamics, limits and conservation.

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Seedling recruitment in response to artificial gaps: predicting the ecological consequence of forest disturbance

Cited by 13 publications

References 66 publications

Influence of Gap Size on Regeneration, Structure and Species Diversity of Woody Vegetation in a Secondary Montane Forest Reserve, Kenya

Influence of Gap Size on Regeneration, Structure and Species Diversity of Woody Vegetation in a Secondary Montane Forest Reserve, Kenya

The influence of species identity and geographic locations on gut microbiota of small rodents

Canopy openness modifies tree seedling distributions along a tropical forest elevation gradient

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