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Post‐fire regeneration in M editerranean reforested sites as affected by mechanical site preparation: lessons for restoration
Author(s) -
Hibsher Nurit,
Moshe Yossi,
BneyMoshe Eitan,
BenMoshe Ezra,
Zangi Ela,
Zuck Aviram,
Osem Yagil
Publication year - 2013
Publication title -
applied vegetation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.096
H-Index - 64
eISSN - 1654-109X
pISSN - 1402-2001
DOI - 10.1111/avsc.12030
Subject(s) - ruderal species , vegetation (pathology) , species richness , abundance (ecology) , pinus brutia , ecological succession , regeneration (biology) , forb , ecology , forestry , grassland , environmental science , biology , geography , botany , habitat , pinus <genus> , medicine , pathology , microbiology and biotechnology
Question The importance of silvicultural site preparation techniques in determining vegetation succession is increasingly recognized. We studied the effects of mechanical site preparation ( MSP ) on post‐fire vegetation regeneration within reforested sites in M editerranean I srael. Location Upper G alilee region, I srael. Methods Vegetation cover and composition, ruderal species colonization and pine regeneration were monitored in four reforested sites for 3 yr following wildland fires that burned mature P inus brutia and P . halepensis plantations. In each reforested site, a 50 m × 50 m monitoring area was assigned and measurements were conducted within five subplots (2 m × 50 m) encompassing three MSP patch types: ploughed patches ( P ), unploughed patches ( UP ) and planting mounds ( M ) that combined ploughing, pit digging and wood‐chip mulching. Results Recovery of vegetation cover (excluding pines) was rapid. The MSP patch type significantly affected vegetation cover in the first spring following the fire: cover was lowest on M , intermediate on P and highest on UP . However, these differences became minor by the third spring following the fire. Total woody species richness was not affected by MSP patch type, although there were minor effects on relative abundance of woody species. Two ruderal species were found, but their abundance became untraceable by the third year. Patterns of MSP effects on pine regeneration were similar for P . halepensis and P . brutia . Density of emerging seedlings of both pine species during the first year following the fire was significantly affected by MSP patch type: lower in P and M than in UP by more than 50% and 90%, respectively. However, emergence and/or survival during the following 2 yr was higher in P and M than in UP , with overall outcome of pine regeneration still about 50% lower in P and M than in UP . Conclusions The MSP treatments had only a minor, short‐term effect on post‐fire regeneration and colonization of vegetation, except for pine recruitment, which was more severely affected.