J 2024

The absence of disturbances promoted Late Holocene expansion of silver fir (Abies alba) in the Bohemian Forest

SCHAFSTALL, Nick; Helena SVITAVSKÁ-SVOBODOVÁ; Martin KADLEC; Mariusz GALKA; Petr KUNEŠ et al.

Základní údaje

Originální název

The absence of disturbances promoted Late Holocene expansion of silver fir (Abies alba) in the Bohemian Forest

Autoři

SCHAFSTALL, Nick; Helena SVITAVSKÁ-SVOBODOVÁ; Martin KADLEC; Mariusz GALKA; Petr KUNEŠ; Přemysl BOBEK; Viktor GOLIÁŠ; Pavel PECH; Daniel NÝVLT; Pavel HUBENÝ; Niina KUOSMANEN; Vachel A. CARTER a Gabriela FLORESCU

Vydání

Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier, 2024, 0031-0182

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 2.700

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/24:00138438

Organizační jednotka

Přírodovědecká fakulta

EID Scopus

Klíčová slova anglicky

Abies alba; Potential natural vegetation; Central Europe; Fire; Insect outbreaks; Holocene climate; Drought tolerance; Archerella flavum

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 13. 1. 2025 10:48, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Temperate forests in the Northern Hemisphere are strongly affected by increasing annual temperatures and natural disturbances such as droughts, fires, and pest outbreaks. In many regions, alternatives are explored by the forestry industry for previously commercialized tree species which are rapidly declining in areas outside their optimal climatic niches. However, as the current ranges of tree species have been mainly constrained by human activity, their true climatic and ecological niches are likely different from our observations. For example, little is known about environmental niches and population dynamics of tree species with limited dispersal ability, such as silver fir (Abies alba). Long-term (paleo) records of past landscape composition, past climate, and past disturbances can help to reveal the natural environmental niches of tree species. This study focuses on the Bohemian Forest (Sumava) in Czechia, where the human alteration of forests in higher elevations (>1000 m asl) has only been demonstrated from Medieval times onward. We present an interdisciplinary approach of geochemistry, pollen, charcoal, botanical and insect macro remains from a high-elevation peat record for the last seven millennia. Our multi-proxy study aimed to identify episodes of increased fire and other disturbances such as insect outbreaks, which could have influenced forest dynamics and vegetation succession in this montane region. However, the charcoal and macro-fossil records do not indicate any large local fires, insect outbreaks, browsing, or other disturbances (e.g., anthropogenic) for a major part of the record, suggesting that changes in the vegetation after 6500 cal yr BP were mainly caused by climatic fluctuations. Silver fir (Abies alba) expanded from 4300 cal yr BP, and likely became the dominant tree species at this locality for the next 2000 years, with extremely high pollen values up to 60%. During the establishment of silver fir around the peat bog around 5600 cal yr BP and its expansion around 4300 cal yr BP, the geochemical record and low counts of the testate amoeba Archerella flavum indicate drier conditions on the peat bog. Comparison with climatic simulations on a 1 x 1-km scale from the CHELSA database suggests that the local expansion of silver fir possibly coincided with a decrease in precipitation during both the wettest and warmest quarter of the year, related to a decreasing trend in seasonality of annual precipitation; this might confirm the species' higher tolerance to drought. Although silver fir is currently extremely rare in the Bohemian Forest, it has the potential for local expansion if logging, fire, and game browsing are kept to a minimum.