Model computations on the impact of changing climate on natural regeneration of Scots pine in Finland

Abstract

Based on model computations, the regeneration of Scots pine (Pinussylvestris L.) in southern (60°N) and northern (66°N) Finland was studied in relation to an elevating temperature. The temperature elevation increased flowering and the subsequent seed crop, particularly in northern Finland, with a decrease in the frequency of zero crops. In southern Finland, the number of seedlings produced by each seed crop increased when applying wide spacing, but decreased when applying narrow spacing of parent trees. This was due to a decrease in soil moisture induced by the increasing evaporative demand and transpiration of the parent trees. In northern Finland, temperature elevation substantially increased the success of regeneration in terms of seedlings produced by each seed crop regardless of the spacing of parent trees. In terms of the density of seedling stands and the height and diameter growth of seedlings, the establishment of a seedling stand within a given period of time was substantially improved under the improved temperature conditions in both southern and northern Finland.

Sensitivity of growth of Scots pine, Norway spruce and silver birch to climate change and forest management in boreal conditions

“…In boreal conditions, climate change may have a large influence on the forest growth and management, as shown in some previous model-based studies (Kellomäki and Kolström, 1993;Kellomäki and Väisänen, 1995;Karjalainen, 1996;Talkkari, 1998;Pussinen et al, 2002). In Finland, the elevation of temperature alone may substantially increase the total growth of Scots pine (Pinus sylvestris), but the proportion of pulp wood in the total timber yield may increase (Kellomäki and Kolström, 1993), mainly due to the need for earlier and more intensive thinnings than at present.…”

Modifying climate change habitat models using tree species-specific assessments of model uncertainty and life history-factors

“…Of course, individual species have very different life-history strategies that are likely to be enhanced or diminished in the face of climate change. For example, many species are adapted so that vegetative reproduction, including regeneration after fire, can occur readily; these species may be available to migrate to new northerly or upslope sites in a changing climate (Kellomaki and Vaisanen, 1995 6. Combination of the scaled five modification factor (ModFacs) metrics plotted on a five-sided star graph with the outer boundary of each equal to a score of three.…”

Density and population structure of the natural regeneration of Scots pine (Pinus sylvestris L.) in the High Ebro Basin (Northern Spain)

“…On the other hand, Scandinavian authors reported the importance of neighbouring seed-producing stands for regeneration success [2,35,41]. The extreme temperatures of Northern Europe limit Scots pine's flowering and cone production [18], whereas in High Ebro Basin seed production is usually abundant.…”