Stand-level mortality models for Nordic boreal forests

Nilsson, Urban (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för sydsvensk skogsvetenskap,Southern Swedish Forest Research Centre

Subramanian, Narayanan (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för sydsvensk skogsvetenskap,Southern Swedish Forest Research Centre

Holmström, Emma (författare): Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för sydsvensk skogsvetenskap,Southern Swedish Forest Research Centre

(creator_code:org_t)

2020
2020
Engelska.
Ingår i: Silva Fennica. - : Finnish Society of Forest Science. - 0037-5330 .- 2242-4075. ; 54

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Abstract Ämnesord

Stäng

New mortality models were developed for the purpose of improving long-term growth and yield simulations in Finland, Norway, and Sweden and were based on permanent national forest inventory plots from Sweden and Norway. Mortality was modelled in two steps. The first model predicts the probability of survival, while the second model predicts the proportion of basal area in surviving trees for plots where mortality has occurred. In both models, the logistic function was used. The models incorporate the variation in prediction period length and in plot size. Validation of both models indicated unbiased mortality rates with respect to various stand characteristics such as stand density, average tree diameter, stand age, and the proportion of different tree species, Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) Karst.), and broadleaves. When testing against an independent dataset of unmanaged spruce-dominated stands in Finland, the models provided unbiased prediction with respect to stand age.

Av författaren/redakt...: Nilsson, Urban; Subramanian, Nar ...; Holmström, Emma

Om ämnet

LANTBRUKSVETENSKAPER: LANTBRUKSVETENSK ...; och Lantbruksvetensk ...; och Skogsvetenskap

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