Do understorey or overstorey traits drive tree encroachment on a drained raised bog?

Jagodziński, Andrzej M.; Horodecki, Paweł; Rawlik, Katarzyna; Dyderski, Marcin K.

doi:10.1111/plb.12569

Cited by 11 publications

(9 citation statements)

References 60 publications

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“…All functional diversity components and CWMs used for analyses of particular invasive species studied were calculated excluding that species, to avoid circular reasoning and biased variable importance, connected with different functional traits (Thomsen et al 2016), for example, overestimated importance of seed mass CWM for Q. rubra, with its high value of this trait. Usage of functional diversity components allows conclusions about impact of plant community on the species of interest (Kurokawa et al 2010;D'Astous et al 2013;Jagodziński et al 2017;Czortek et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Drivers of invasive tree and shrub natural regeneration in temperate forests

Dyderski

Jagodziński

2018

Biol Invasions

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We assessed drivers of ecological success along resource availability gradients for three invasive woody species: Prunus serotina Ehrh., Quercus rubra L. and Robinia pseudoacacia L. We aimed to check how much of invasion success, measured by invader biomass, is explained by propagule pressure and plant community invasibility. Using 3 years of observations from 372 study plots (100 m 2 each) in temperate forests of Wielkopolski National Park (Poland) we investigated the hierarchy of predictors and partial dependencies using the random forest method. Our study indicated that propagule pressure explained more variance in success of invaders than invasibility-describing availability of resources and competitors in understory vegetation. We also found different responses of seedlings and saplings, connected with dependence on stored carbohydrates, which decreased seedling responses to resource availability gradients. However, resource availability (light and leaf litter predictors) had greater influence than predictors describing understory vegetation. Based on importance and response strength the species studied may be arranged by decreasing requirements for soil fertility and acidity: P. serotina \ Q. rubra \ R. pseudoacacia, whereas for light requirements and competition vulnerability the order is: P. serotina [ Q. rubra [ R. pseudoacacia. However, low light requirements of R. pseudoacacia may be biased by high proportion of sprouts supplied by parental trees. Results provide guidelines for effective management of invasive woody species in forest ecosystems and describe complex interactions between factors studied on ecological success of invaders.

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Section: Discussionmentioning

confidence: 99%

Drivers of invasive tree and shrub natural regeneration in temperate forests

Dyderski

Jagodziński

2018

Biol Invasions

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“…In each plot, we investigated only natural regeneration of P. abies within three age-height classes (Jagodziński et al 2017): seedlings (plants germinated in the current year), short saplings (plants ≥ 1 year old and < 0.5 m tall), and tall saplings (plants 0.5-1.3 m tall). Data on other woody plant species (which rarely occurred) was collected but not analyzed.…”

Section: Data Collectionmentioning

confidence: 99%

“…A similar trend was reported by Jonášová and Prach (2004), who found similar amounts of natural P. abies regeneration in both uncleared and cleared forest patches. Our previous study (Jagodziński et al 2017) on natural regeneration of pioneer species (Pinus sylvestris and Betula pubescens) Table 2 Zero-and one-inflated beta regression models of natural regeneration of Picea abies ageheight class proportions in the regeneration layer: seedlings (germinated in the current year), short saplings (≥ 1 year old, < 50 cm height), and tall saplings (50-130 cm height). AIC of final models: seedlings 245.0 (AIC 0 = 247.5), short saplings 293.3 (AIC 0 = 299.4), and tall saplings 207.4 (AIC 0 = 210.0) also revealed that seedlings differ in ecological requirements from short saplings.…”

Section: Impact Of Resource Availabilitymentioning

confidence: 99%

“…Natural regeneration is a crucial process responsible for generational replacement in forest ecosystems (Baraloto et al 2005;Beckage et al 2005;Dech et al 2008). Young regeneration is especially vulnerable to limiting abiotic factors, for instance frost or drought (Niinemets and Valladares 2006;Eckstein et al 2011;Jagodziński et al 2017), as well as to herbivory (de Chantal and Granström 2007;Iszkuło et al 2014;Bodziarczyk et al 2017), leading to low survival rates. Another important factor is competition with understory herbaceous species (Lorimer et al 1994;Emborg 1998;Chmura and Sierka 2007), as well as competition within the regeneration layer, both intra-and interspecific (Janzen 1970;Robakowski and Bielinis 2011;Kawaletz et al 2014;Martínez-García et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Impacts of soil conditions and light availability on natural regeneration of Norway spruce Picea abies (L.) H. Karst. in low-elevation mountain forests

Dyderski

Gazda

Hachułka

et al. 2018

Annals of Forest Science

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& Key message Natural regeneration of P. abies (L.) H. Karst. may reach high densities in lower mountain elevations. The highest densities were found in sites with moderate light availability, with low pH, and not near the riverbank. However, age-height classes differed in the predicted magnitude of response, but were consistent in response directions. Mosses and understory species typical of coniferous forests were positively correlated with regeneration density. & Context Norway spruce Picea abies (L.) H. Karst. in Central Europe is at risk under climate change scenarios, particularly in mountain regions. Little is known about the impact of environmental factors on the natural regeneration of P. abies in lowelevation mountain forests. & Aims We aimed to assess impacts of distance from the riverbank, soil pH, and light availability on natural P. abies regeneration. We hypothesized that (1) natural P. abies regeneration would depend on light availability and soil pH and (2) there are understory plant species which may indicate the microsites suitable for natural regeneration of P. abies. & Methods The study was conducted in the Stołowe Mountains National Park (SW Poland, 600-800 m a.s.l.). We established 160 study plots (25 m 2) for natural regeneration, light availability, soil pH, and understory vegetation assessment.

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“…When scaling up different leaf traits to whole ecosystems [36,37], the structural parameters of ecosystems are some of the most important controlling factors [38,39]. However, species in the same vertical stratification, such as the tree and grass layers in temperate forests and the trees, shrubs, and grasses in tropical rainforests, have similar living environments, and thus similar leaf traits [40][41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Effects of Forest Canopy Vertical Stratification on the Estimation of Gross Primary Production by Remote Sensing

Lin

Liu

et al. 2018

Remote Sensing

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Gross primary production (GPP) in forests is the most important carbon flux in terrestrial ecosystems. Forest ecosystems with high leaf area index (LAI) values have diverse species or complex forest structures with vertical stratifications that influence the carbon–water–energy cycles. In this study, we used three light use efficiency (LUE) GPP models and site-level experiment data to analyze the effects of the vertical stratification of dense forest vegetation on the estimates of remotely sensed GPP during the growing season of two forest sites in East Asia: Dinghushan (DHS) and Tomakomai (TMK). The results showed that different controlling environmental factors of the vertical layers, such as temperature and vapor pressure deficit (VPD), produce different responses for the same LUE value in the different sub-ecosystems (defined as the tree, shrub, and grass layers), which influences the GPP estimation. Air temperature and VPD play important roles in the effects of vertical stratification on the GPP estimates in dense forests, which led to differences in GPP uncertainties from −50% to 30% because of the distinct temperature responses in TMK. The unequal vertical LAI distributions in the different sub-ecosystems led to GPP variations of 1–2 gC/m2/day with uncertainties of approximately −30% to 20% because sub-ecosystems have unique absorbed fractions of photosynthetically active radiation (APAR) and LUE. A comparison with the flux tower-based GPP data indicated that the GPP estimations from the LUE and APAR values from separate vertical layers exhibited better model performance than those calculated using the single-layer method, with 10% less bias in DHS and more than 70% less bias in TMK. The precision of the estimated GPP in regions with thick understory vegetation could be effectively improved by considering the vertical variations in environmental parameters and the LAI values of different sub-ecosystems as separate factors when calculating the GPP of different components. Our results provide useful insight that can be used to improve the accuracy of remote sensing GPP estimations by considering vertical stratification parameters along with the LAI of sub-ecosystems in dense forests.

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Do understorey or overstorey traits drive tree encroachment on a drained raised bog?

Cited by 11 publications

References 60 publications

Drivers of invasive tree and shrub natural regeneration in temperate forests

Drivers of invasive tree and shrub natural regeneration in temperate forests

Impacts of soil conditions and light availability on natural regeneration of Norway spruce Picea abies (L.) H. Karst. in low-elevation mountain forests

Effects of Forest Canopy Vertical Stratification on the Estimation of Gross Primary Production by Remote Sensing

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