Predictions of the community assemblage in a temperate forest through indicators that evaluate the anthropogenic disturbance effect on natural regeneration

Bonilla-Valencia, Leticia; Castillo-Argüero, Silvia; Martínez-Orea, Yuriana; García, Francisco Javier Espinosa; Lindig‐Cisneros, Roberto; Álvarez-Añorve, Mariana Yolotl; Ávila-Cabadilla, Luis Daniel

doi:10.1016/j.flora.2021.151764

Cited by 6 publications

(7 citation statements)

References 49 publications

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“…In addition, in cases where exotic plants also form mycorrhizal associations, native orchids can become displaced due to overlapping webs of fungi (Bonnardeaux et al, 2007). Moreover, generally weeds are indicators of a history of high anthropogenic disturbance (Bonilla‐Valencia et al, 2021), with greater presence of exotic species being often associated with greater past or present grazing intensity (Wraith & Pickering, 2019). Therefore, the orchid species that are able to survive in more invaded places could be benefiting from grazing being mainly directed to palatable exotic grasses.…”

Section: Discussionmentioning

confidence: 99%

Simultaneous effect of habitat remnancy, exotic species, and anthropogenic disturbance on orchid diversity in South Australia

Martín‐Forés

Bywaters

Sparrow

et al. 2022

Conservat Sci and Prac

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Orchids are potentially useful as ecological indicators because of their sensitivity to habitat fragmentation and anthropogenic disturbance. While many studies explore the effect of single factors on orchid diversity, few investigate how the extent, configuration, and condition of surrounding habitat affect whole orchid communities. Here, we unravel the effect of biological invasions, anthropogenic disturbance (i.e., grazing pressure, ecological condition), and habitat fragmentation on an Australian orchid community. We sampled 39 plots across nine sites in the Mount Lofty Ranges, Australia. We recorded the number of orchid species and number of individuals per species in mid‐winter, early‐spring, and late‐spring to account for the effect of season on species visibility, with 115 surveys in total. We ranked grazing intensity and ecological condition, and estimated cover of exotic species. We analyzed the response of richness and diversity through generalized linear mixed models, and differences in species composition through non‐metric multidimensional scaling. Habitat configuration in the surrounding landscape had different effects at increasing radii, explaining 29%–87% of variance. Patch‐level orchid diversity was positively correlated with habitat edges in the immediate area, and with habitat cohesion at medium scales, whereas diversity was negatively correlated with increasing mean patch habitat area across larger surrounding areas. Orchids co‐existed with exotic species but were negatively affected once exotic cover exceeded 20%. Species composition was correlated with exotic cover. Our findings reveal a complex relationship between orchid communities and their surrounding environments suggesting orchids benefit from a somewhat disturbed environment at patch and landscape scales. These idiosyncratic responses suggest orchid diversity may be unreliable as early‐warning indicators of habitat disturbance.

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Section: Discussionmentioning

confidence: 99%

Simultaneous effect of habitat remnancy, exotic species, and anthropogenic disturbance on orchid diversity in South Australia

Martín‐Forés

Bywaters

Sparrow

et al. 2022

Conservat Sci and Prac

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“…Seed abundance, species richness, and the composition of the soil seed bank are important indicators of natural regeneration and information about them is therefore useful for ecological restoration and conservation [13,51,72]. Seed abundance and richness of tree species were low, and several dominant canopy tree species such as Castanea henryi, Schefflera octophylla, and Symplocos ramosissima were absent from the soil seed bank of the subtropical evergreen broadleaved forest.…”

Section: Discussionmentioning

confidence: 99%

Influence of Simulated Nitrogen Deposition on the Soil Seed Bank of a Subtropical Evergreen Broadleaved Forest

Wang

Huang

Guo

et al. 2021

Forests

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Increased nitrogen (N) deposition may have profound effects on forest ecosystems. However, information on the impacts of elevated N deposition on belowground soil seed bank in forests is lacking. In a field experiment, we added N at 50 and 25 kg N ha−1 year−1 to the canopy (CAN50 and CAN25) and to the understory (UAN50 and UAN25), to determine the effects of N deposition on soil seed bank structure and composition in a subtropical evergreen broadleaved forest. A total of 1545 seedlings belonging to 37 species emerged from the 10 cm-depth soil samples. After 6 years of N addition, soil seed bank density significantly increased at the depth of 0–10 cm under CAN50 treatment relative to the control. N addition did not significantly affect species richness, the Simpson index, Shannon–Wiener index, or Pielou index of the soil seed banks. Seed bank density and species richness were positively correlated with soil organic matter content. For the whole 0–10 cm soil layer, the percentage of total seed abundance and total species richness represented by tree species among the N-addition treatments was ≤9.3% and ≤16.1%, respectively. Soil seed bank composition was similar among UAN25, UAN50, and the control, but canopy N addition and especially CAN50 altered the species composition of the seed bank. Overall, our results indicate that artificial canopy N deposition at 50 kg N ha−1 year−1 but not understory N addition tends to promote seed storage and to change species composition in the soil seed bank. Because of the dominance of shrubs and herbs in the soil seed bank, the potential to regenerate tree species from the soil seed bank is limited in the subtropical evergreen broadleaved forest.

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“…To test the relationships between the functional indices and environmental parameters, linear regression models were fitted with permutation tests (999 permutations) using the lmp function from R package lmPerm [ 41 ]. Finally, based on the fitted linear regression models, stepwise selection, and previous studies [ 26 , 42 , 43 , 44 , 45 ], structural equation models (SEMs) were used to evaluate the above- and below-ground environmental effects on community taxonomic and functional diversity. To examine the fitness of the SEMs, two statistics, global goodness-of-fit (i.e., Fisher’s C test) [ 26 , 46 ] and Akaike’s Information Criterion (AIC) [ 45 , 47 ], were used.…”

Section: Methodsmentioning

confidence: 99%

Plant-Community Vulnerability in Highly Fragmented Landscapes Is Higher in Secondary Forests Than in Old Growth Forests in the Andean–Amazonian Transition

Rodríguez-León

Roa-Fuentes

Sterling

et al. 2022

Plants

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Increasing biodiversity in highly diverse plant communities can jointly increase ecosystem function and ecosystem vulnerability. This paradox requires further attention. This study analyzed the functional response of plant communities to above- and below-ground parameters along the chronosequence (degraded pastures (DP), early forests (EF), intermediate forests (IF), and old-growth forests (OF)) in two highly fragmented landscapes of the Colombian Amazon as an estimate of the level of functional vulnerability. Three sets of functional attributes were evaluated: (i) functional composition based on the community-weighted mean (CWM) of five traits; (ii) functional diversity based on the multi-trait indices and functional dispersion (FDis) of each individual trait; and (iii) the functional vulnerability at the community-level and species-level. The individual traits did not show a clear pattern along the chronosequence. However, the trend indicated an increase in the values of resource conservation traits with the age of abandonment. The functional response of the community did not vary between landscapes. Between DP and OF, there was a significant increase in functional diversity and a decrease in functional redundancy, which increased community-level vulnerability. Consequently, the more vulnerable species were observed in the IF and OF plots. In addition, a decrease in environmental parameters, such as penetration resistance, bulk density and Ca content, and an increase in slope, precipitation, electric conductivity, pH, clay, organic material, and P and N contents increased the vulnerability. We elucidated the need for secondary forest management in terms of conservation and restoration to maintain the capacity to respond to changing environmental conditions in highly fragmented landscapes in the Andean–Amazonian transition.

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Predictions of the community assemblage in a temperate forest through indicators that evaluate the anthropogenic disturbance effect on natural regeneration

Cited by 6 publications

References 49 publications

Simultaneous effect of habitat remnancy, exotic species, and anthropogenic disturbance on orchid diversity in South Australia

Simultaneous effect of habitat remnancy, exotic species, and anthropogenic disturbance on orchid diversity in South Australia

Influence of Simulated Nitrogen Deposition on the Soil Seed Bank of a Subtropical Evergreen Broadleaved Forest

Plant-Community Vulnerability in Highly Fragmented Landscapes Is Higher in Secondary Forests Than in Old Growth Forests in the Andean–Amazonian Transition

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