000 02483nab a2200301 4500
003 OSt
005 20220821162411.0
007 cr aa aaaaa
008 220821b |||||||| |||| 00| 0 eng d
100 _aBrown, KJ
_952171
245 _aLong-term climate, vegetation and fire regime change in a managed municipal water supply area, British Columbia, Canada/
260 _bSage,
_c2019.
300 _aVol 29, issue 9, 2019 : (1411-1424 p.).
520 _aPost-glacial climate, vegetation and fire history were reconstructed from a sediment record from Begbie Lake, British Columbia, Canada, located in a municipal water supply area servicing > 350,000 people. Watershed managers have identified wildfire as a threat to water supply and seek to understand how vegetation and fire have varied through time with climate. In the cold late-glacial, open Pinus woodlands, periodically disturbed by fire, transitioned to mixed conifer forests subject to high-severity fire. The early Holocene is of interest to watershed managers because climate was warmer and drier than present. During this interval, low streamflow, abundant fire-adapted taxa, elevated background charcoal and regional increases in biomass burning indicate that fire seasons were longer and that fire was an important disturbance mechanism. Climate moistened in the mid Holocene, facilitating canopy closure and decreased fire disturbance. However, surface fires prevailed in Quercus ecosystems, which were expanding locally. Charcoal increased between 6180–2500 cal yr BP as climate further cooled and moistened, likely reflecting human activity and/or increased climate variability. Modern conditions arose within the last few millennia, impacted most recently by European settlement. In combination with paleoclimate modelling, modern management practices and forecast simulations, the Begbie Lake record informs about ecosystem changes within the watershed, yielding insights for management.
650 _aclimate, fire,
_952172
650 _aHolocene,
_950806
650 _a management,
_951983
650 _avegetation,
_950653
650 _awater supply
_952173
700 _aHebda, NJR
_952174
700 _aSchoups, G
_952175
700 _aConder, N
_952176
700 _aSmith, KAP
_952177
700 _aTrofymow, JA
_952178
773 0 _012756
_916504
_dLondon: Sage Publication Ltd, 2019.
_tHolocene/
_x09596836
856 _uhttps://doi.org/10.1177/0959683619854523
942 _2ddc
_cART
999 _c12855
_d12855