The importance of large-tree retention for the persistence of old-growth epiphytic bryophyte Neckera pennata in selection harvest systems

Eriksson, Anna-Maria; Villard, Marc‐André

doi:10.1016/j.foreco.2016.04.013

Cited by 13 publications

(5 citation statements)

References 35 publications

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“…It is precisely among those indicator species for the oldest trees that we find the highest frequency of Macaronesian endemic species as well as red‐listed species considered as Vulnerable ( Cololejeunea schaeferi, Echinodium spinosum, Leptodon longisetus ) and Near‐Threatened ( Andoa berthelotiana, Exsertotheca intermedia, Frullania polysticta, Isothecium algarvicum, I. prolixum, Leucobryum albidum, Plagiothecium nemorale, Tetrastichium fontanum ) in Madeira (Sim‐Sim et al., ). Old trees, even if located in historically harvested forest remnants, exhibit rich epiphyte communities provided that they are located in climatically suitable areas (Edman, Eriksson, & Villard, ; Lindenmayer & Laurance, ). Since, in Madeira, even the oldest forest stands such as Folhadal show signs of historical harvesting dating back to about 150 years ago, so that actual ancient forest stands may not exist in the archipelago, the conservation of clusters of late‐successional (broadleaved) trees, enhancing connectivity at such small spatial scales as tens of metres, is of utmost importance for the conservation of the unique laurel forest epiphytic flora of Madeira.…”

Section: Discussionmentioning

confidence: 99%

“…For each species with an ISA >0.10, the ISA value and its significance level (* <0.05, ** <0.01, *** <0.001) are indicated. | 1735 exhibit rich epiphyte communities provided that they are located in climatically suitable areas (Edman, Eriksson, & Villard, 2016;Lindenmayer & Laurance, 2017). Since, in Madeira, even the oldest forest stands such as Folhadal show signs of historical harvesting dating back to about 150 years ago, so that actual ancient forest stands may not exist in the archipelago, the conservation of clusters of late-successional (broadleaved) trees, enhancing connectivity at such small spatial scales as tens of metres, is of utmost importance for the conservation of the unique laurel forest epiphytic flora of Madeira.…”

Section: Discussionmentioning

confidence: 99%

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Trees as habitat islands: Temporal variation in alpha and beta diversity in epiphytic laurel forest bryophyte communities

Patiño

Gómez‐Rodríguez

Pupo-Correia

et al. 2018

Journal of Biogeography

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Aim Trees represent striking examples of habitat islands, with various degrees of spatial isolation and evolving properties during their life cycle. Here, we investigate whether changes in habitat conditions, dispersal limitations or competition cause variation in patterns of epiphytic species richness and turnover. Location Madeira island. Taxon Bryophytes. Methods Using linear mixed effect models, we test whether species richness exhibits a monotonic or hump‐shaped relationship with time. Two groups of host‐tree species, late‐ and early‐successional, were considered. We further identify the mechanisms explaining the observed variation in species composition by dividing beta diversity into its nestedness (βsne) and turnover (βsim) components and correlating them with tree age and geographical distance among trees. Results The best‐fit models all included tree age (T), but its quadratic term (T2) and tree height (H, here a surrogate of area) were not systematically included. βsim, but not βsne, correlated with host‐tree age, and both βsim and βsne correlated with geographical distance. Main conclusions Tree age was consistently included in all of the best‐fit models, reflecting the progressive increase in epiphyte bryophyte species richness through time. The limited contribution of T2 and H to the best models suggests that competition for space is not a key factor on mature trees. The correlation of βsim, but not βsne, with host‐tree age, and of βsim and βsne with distance among trees, suggests that variation in species composition is caused by (1) temporal community shifts due to allogenic drivers and (2) dispersal limitations, which are reflected by the higher similarity of the epiphyte communities on clustered trees rather than by an increasing probability of colonization with tree age. Since actual ancient laurel forests may no longer exist in Madeira, the conservation of clusters of late‐successional trees, enhancing connectivity at small spatial scales, is of utmost importance for the conservation and recovery of the unique laurel forest epiphytic flora.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Trees as habitat islands: Temporal variation in alpha and beta diversity in epiphytic laurel forest bryophyte communities

Patiño

Gómez‐Rodríguez

Pupo-Correia

et al. 2018

Journal of Biogeography

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“…Alternatively, it might be due to a higher opportunity of D. viride to avoid competition with dominant humo‐corticolous epiphyte species by settling higher on the trunk (Bardat and Hugonnot 2002). Overall, sylvicultural practices aimed at maximizing the presence of large deciduous trees within stands – such as extending harvest rotation period or retaining large trees during clear‐cutting, seem to be relevant approaches, as has already been suggested for bryophytes (Edman et al 2016) or lichens (Sillett et al 2000, Nascimbene et al 2007). At stand scale, we showed that colonization probability decreases rapidly in the immediate surroundings of each source population (i.e.…”

Section: Discussionmentioning

confidence: 96%

Disentangling fine‐ and large‐scale colonization processes in metapopulation dynamics: a case study on a threatened epiphytic bryophyte

Percel,

Bouget,

Gosselin

et al. 2024

Oikos

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Understanding the colonization process of species living in a dynamic fragmented habitat is essential to assess their persistence. In the metapopulation theory, the colonization of a species can be quantified using the turnover of occupancy in habitat patches. However, this approach is often limited by the feasible size of surveyed areas. Because many species are capable of long‐distance dispersal, such areas often constitute open systems undergoing colonization of propagules coming from outside, the ‘background deposition'. We focus on disentangling background deposition from local colonization among surveyed patches when analyzing turnover. We consider two spatial scales: 1) focal areas where all patches are monitored over time; 2) a larger extent, encompassing the focal areas, over which the distribution of the target species is quantified with a coarse spatial grain. Our key idea is to use the regional connectivity of focal areas within the larger scale as a covariate when analyzing colonization events within focal areas. A positive effect of regional connectivity on the colonization probability of patches may indicate background deposition. We applied this approach to the epiphytic bryophyte Dicranum viride in a managed temperate deciduous forest, considering phorophyte trees as patches, forest stands as focal areas and the whole forest as the larger scale. We combined a fine‐grained turnover survey of occupied trees within three forest stands (~ 3 ha) with a coarse‐grained snapshot of D. viride distribution over the forest (~ 15 000 ha). Regional connectivity came out as the most significant factor, with a strong positive effect on colonization probability within stands. However, it was attributed to sources in the immediate vicinity of focal stands, suggesting a short‐ranged colonization process occurring across stands' borders rather than long‐distance background deposition. Our results thus call for maintaining a stepping‐stone of habitat across the forest through time to improve D. viride persistence.

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“…Large DBH implies that trees are old enough to have provided a longer time for colonization by more epiphytic bryophyte species [72]. In addition, the moisture content of the bark may increase with increasing DBH [10], which is also conducive to the growth of epiphytic bryophytes. Another positive factor on recruitment count for species richness was LAI.…”

Section: Factors Affecting Epiphytic Bryophyte Recruitmentmentioning

confidence: 99%

“…The colonization and subsequent development of epiphytic bryophyte diversity are regulated by factors at the tree, stand, and global scales [7,8]. At the tree level, many studies have emphasized that the total tree height (H) [9], diameter at breast height (DBH) [10], canopy openness [11], age [12], and bark characteristics [13] are the driving factors of the diversity of epiphytic bryophytes. At the stand level, diversified microhabitats drive the development of epiphyte diversity that results from stand characteristics such as tree species composition [14], the continuity of the forest area [15], forest age [16], and tree density [17].…”

Section: Introductionmentioning

confidence: 99%

Using Count Data Models to Predict Epiphytic Bryophyte Recruitment in Schima superba Gardn. et Champ. Plantations in Urban Forests

Zhao

Sun

Wang

et al. 2020

Forests

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Epiphytic bryophytes are known to perform essential ecosystem functions, but their sensitivity to environmental quality and change makes their survival and development vulnerable to global changes, especially habitat loss in urban environments. Fortunately, extensive urban tree planting programs worldwide have had a positive effect on the colonization and development of epiphytic bryophytes. However, how epiphytic bryophytes occur and grow on planted trees remain poorly known, especially in urban environments. In the present study, we surveyed the distribution of epiphytic bryophytes on tree trunks in a Schima superba Gardn. et Champ. urban plantation and then developed count data models, including tree characteristics, stand characteristics, human disturbance, terrain factors, and microclimate to predict the drivers on epiphytic bryophyte recruitment. Different counting models (Poisson, Negative binomial, Zero-inflated Poisson, Zero-inflated negative binomial, Hurdle-Poisson, Hurdle-negative binomial) were compared for a data analysis to account for the zero-inflated data structure. Our results show that (i) the shaded side and base of tree trunks were the preferred locations for bryophytes to colonize in urban plantations, (ii) both hurdle models performed well in modeling epiphytic bryophyte recruitment, and (iii) both hurdle models showed that the tree height, diameter at breast height (DBH), leaf area index (LAI), and altitude (ALT) promoted the occurrence of epiphytic bryophytes, but the height under branch and interference intensity of human activities opposed the occurrence of epiphytic bryophytes. Specifically, DBH and LAI had positive effects on the species richness recruitment count; similarly, DBH and ALT had positive effects on the abundance recruitment count, but slope had a negative effect. To promote the occurrence and growth of epiphytic bryophytes in urban tree planting programs, we suggest that managers regulate suitable habitats by cultivating and protecting large trees, promoting canopy closure, and controlling human disturbance.

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The importance of large-tree retention for the persistence of old-growth epiphytic bryophyte Neckera pennata in selection harvest systems

Cited by 13 publications

References 35 publications

Trees as habitat islands: Temporal variation in alpha and beta diversity in epiphytic laurel forest bryophyte communities

Trees as habitat islands: Temporal variation in alpha and beta diversity in epiphytic laurel forest bryophyte communities

Disentangling fine‐ and large‐scale colonization processes in metapopulation dynamics: a case study on a threatened epiphytic bryophyte

Using Count Data Models to Predict Epiphytic Bryophyte Recruitment in Schima superba Gardn. et Champ. Plantations in Urban Forests

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