Forest management regulates temporal change in the cover of boreal plant species

Tonteri, Tiina; Salemaa, Maija; Rautio, Pasi; Hallikainen, Ville; Korpela, Leila; Merilä, Päivi

doi:10.1016/j.foreco.2016.09.015

Cited by 69 publications

(82 citation statements)

References 37 publications

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“…As the forest overstory strongly influences the composition and abundance of the understory vegetation (Hart and Chen 2006), the shift toward more shade-tolerant vegetation types seen in our data is probably caused by increases in timber volume and denser, darker forests (Reinkainen et al 2000, Sandstr€ om et al 2016, Tonteri et al 2016, SLU 2017. Support for this hypothesis is also provided by the minor forest-age-related variations, as more than 90% of vegetation-type comparisons between the 1950 and 2000 periods revealed similar trends across age classes.…”

Section: Driversmentioning

confidence: 69%

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Half a century of multiple anthropogenic stressors has altered northern forest understory plant communities

Hedwall

Gustafsson

Brunet

et al. 2019

Ecological Applications

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Boreal forests form the largest and least disturbed forest biome in the northern hemisphere. However, anthropogenic pressure from intensified forest management, eutrophication, and climate change may alter the ecosystem functions of understory vegetation and services boreal forests provide. Swedish forests span long gradients of climate, nitrogen deposition, and management intensity. This makes them ideal to study how the species composition and functions of other, more pristine, boreal forests might change under increased anthropogenic pressure. Moreover, the National Forest Inventory (NFI) has collected systematic data on Swedish forest vegetation since the mid‐20th century. We use this data to quantify changes in vegetation types between two periods, 1953–1962 and 2003–2012. The results show changes in forest understory vegetation since the 1950s at scales not previously documented in the boreal biome. The spatial extent of most vegetation types changed significantly. Shade‐adapted and nutrient‐demanding species (those with high specific leaf area) have become more common at the expense of light‐demanding and nutrient‐conservative (low specific leaf area) species. The cover of ericaceous dwarf shrubs decreased dramatically. These effects were strongest where anthropogenic impacts were greatest, suggesting links to drivers such as nitrogen deposition and land‐use change. These changes may impact ecosystem functions and services via effects on higher trophic levels and faster plant litter decomposition in the expanding vegetation types. This, in turn, may influence nutrient dynamics, and consequently ecosystem productivity and carbon sequestration.

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Section: Driversmentioning

confidence: 69%

“…, Tonteri et al. , SLU ). Support for this hypothesis is also provided by the minor forest‐age‐related variations, as more than 90% of vegetation‐type comparisons between the 1950 and 2000 periods revealed similar trends across age classes.…”

Section: Discussionmentioning

confidence: 99%

Half a century of multiple anthropogenic stressors has altered northern forest understory plant communities

Hedwall

Gustafsson

Brunet

et al. 2019

Ecological Applications

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“…Hedwall & Brunet ; Tonteri et al . ). For example we found the density of V. myrtillus to increase, whereas D. flexuosa decreased.…”

Section: Discussionmentioning

confidence: 97%

“…Recent studies show that many forest floor species have changed their frequencies and cover in boreal and temperate forests in Fennoscandia (Hedwall & Brunet ; Tonteri et al . ).…”

Section: Discussionmentioning

confidence: 97%

Informative plot sizes in presence‐absence sampling of forest floor vegetation

et al. 2017

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Summary1. Plant communities are attracting increased interest in connection with forest and landscape inventories due to society's interest in ecosystem services. However, the acquisition of accurate information about plant communities poses several methodological challenges. Here, we investigate the use of presence-absence sampling with the aim to monitor state and change in plant density. We study what plot sizes are informative, i.e. the estimators should have as high precision as possible. 2. Plant occurrences were modelled through different Poisson processes and tests were developed for assessing the plausibility of the model assumptions. Optimum plot sizes were determined by minimizing the variance of the estimators. While state estimators of similar kind as ours have been proposed in previous studies, our tests and change estimation procedures are new. 3. We found that the most informative plot size for state estimation is 1Á6 divided by the plant density, i.e. if the true density is 1 plant per square metre the optimum plot size is 1Á6 square metres. This is in accordance with previous findings. More importantly, the most informative plot size for change estimation was smaller and depended on the change patterns. We provide theoretical results as well as some empirical results based on data from the Swedish National Forest Inventory. 4. Use of too small or too large plots resulted in poor precision of the density (and density change) estimators. As a consequence, a range of different plot sizes would be required for jointly monitoring both common and rare plants using presence-absence sampling in monitoring programmes.

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“…It has been found that on mineral soils bilberry cover increases with forest stand age and basal area and decreases strongly in regeneration cuttings (Tonteri et al. , Turtiainen et al. , Nilsson and Cory ).…”

Section: Discussionmentioning

confidence: 99%

The effect of human‐modified landscape structure on forest grouse broods in two landscape types

et al. 2017

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Citation: Huhta, E., P. Helle, V. Nivala, and A. Nikula. 2017. The effect of human-modified landscape structure on forest grouse broods in two landscape types. Ecosphere 8(9):e01950. 10. 1002/ecs2.1950 Abstract. The population sizes and the breeding success of Finnish tetraonids have been decreasing for decades. In this study, the presence of a grouse hen with a brood in a landscape was used to indicate habitat-related breeding success. We combined the locations of 938 black grouse (Tetrao tetrix), 388 capercaillie (T. urogallus), and 917 hazel grouse (Tetrastes bonasia) broods after the breeding season in midAugust with landscape data by employing Geographic Information System and grouse data derived from the Finnish wildlife triangle censuses conducted during [1997][1998][1999][2000][2001][2002][2003][2004]. Two large study areas with different landscape structures, northern forest-mire area and southern cultivated area, were selected for the investigation. The presence of grouse broods was positively related to the amount of old coniferous mixed forest. Grouse broods may prefer this forest habitat because of a rich understorey cover and a rich bilberry field layer offering a diversity of insects as food. Broods had a strong positive response to the amount of forest habitat. The effect of forest fragmentation on the broods' distribution did not increase even with decreasing forest habitat. We suggest that there are several ecological causes for the observed spatial correlations. Predation on nests and broods by generalist predators is presumably high in human-modified open and semi-open landscapes. Against our expectations, the effect of landscape composition on grouse broods was more marked in the northern than in the southern study area, most likely because predator populations are more food-regulated in the north. This finding supports the alternative prey hypothesis. Further, large drained and reforested peatland mire areas had a negative impact on grouse broods in the north. In the drainage areas, decreased availability of vegetation cover and insect food, increased predation risk, and drowning of chicks in ditches may increase brood mortality.

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Forest management regulates temporal change in the cover of boreal plant species

Cited by 69 publications

References 37 publications

Half a century of multiple anthropogenic stressors has altered northern forest understory plant communities

Half a century of multiple anthropogenic stressors has altered northern forest understory plant communities

Informative plot sizes in presence‐absence sampling of forest floor vegetation

The effect of human‐modified landscape structure on forest grouse broods in two landscape types

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