Līga Strazdiņa - Academia.edu (original) (raw)
Papers by Līga Strazdiņa
The aim of this study was to describe bryophyte communities on three substrate types (living tree... more The aim of this study was to describe bryophyte communities on three substrate types (living tree stem, decaying log, forest floor) in natural deciduous tree forest stands in a small-scale heterogeneous habitat. In total, six liverwort and 42 moss species were recorded. Bryophyte community composition and species richness were strongly related to forest stand properties (forest age, soil moisture, and tree species) and substrate pH value. Most of the recorded woodland key habitat indicator species occurred on living tree stems in Quercus robur and Tilia cordata forest stands. The highest bryophyte species richness was observed on decaying trees in the successional stage from epiphytic to epigeous species communities. As the forest floor layer was not suitable for epigeous bryophytes on Ozolu Island, many of these species occurred on decaying logs.
Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences., 2021
Broad-leaved trees play an important role in supporting epiphyte richness in deciduous forests. I... more Broad-leaved trees play an important role in supporting epiphyte richness in deciduous forests. In this study we tested which broad-leaved forest stands in terms of tree composition best predicted biodiversity in regard to bryophyte species number and their functional traits. The bryoflora was surveyed in 70 stands differing in dominant broad-leaved tree species. One circular plot with diameter 30 meters was established in each stand situated in different parts of Latvia. Fifty-three of the plots were located in stands identified as protected habitats of the European Union. In total, 82 bryophyte species were recorded. At plot level the total number of species ranged between 6 and 38 species. Using principal component analysis (PCA), the ordination axes explained 41% of the variation in composition of bryophytes. The PCA axes were related to tree species composition. The presence of broad-leaved trees, especially ash, lime, and oak, was connected with higher species richness. Genera...
Journal of Bryology, 2013
ABSTRACT Bryophyte species composition, richness and life-form distributions were studied in a su... more ABSTRACT Bryophyte species composition, richness and life-form distributions were studied in a succession after termination of land-use as meadows and pasture in the Moricsala Strict Nature Reserve. Detailed lists of bryophyte species in various vegetation types, which were produced in the early 1900s by Karl Reinhold Kupffer, were compared with those prepared from 2006 to 2010 to determine changes in species composition. Colonisations and extinctions of bryophyte species and life forms could be explained by increases in available substrates (living trees, dead wood, ground layer disturbance patches), and increasingly shaded conditions. In each forest type, the species diversity (alpha diversity) increased, but the differences (beta diversity) between the types decreased. The total number of bryophyte species recorded in the studied forest area increased from 110 to 134 and that of rare (including Woodland Key Habitat indicator species) and protected species from 14 to 21 species. Twenty species were lost during the forest succession, but most of these species still occur within the reserve in open habitats. Life forms such as small compact cushions and short turfs tended to be lost during the forest succession, while smooth and rough mat life forms were better adapted to the new conditions and increased in richness.
Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were ... more Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were determined using historical records and recent data. Detailed studies of the bryoflora on Moricsala were published in 1931 and 1979. A recent study was carried out starting in 2006, in which bryophytes were recorded separately on different substrates. In total, 182 taxa have been found in the study area, including 25 rare and WKH indicator species. The highest species richness occurs on the forest floor. Since 1931, much of the previous meadow habitat has overgrown to forest. Forests have become more shaded and substrate diversity has likely increased, leading to an increased number of epiphytic and epixylic species. Nine meadow species have become extinct in the study area.
Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were ... more Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were determined using historical records and recent data. Detailed studies of the bryoflora on Moricsala were published in 1931 and 1979. A recent study was carried out starting in 2006, in which bryophytes were recorded separately on different substrates. In total, 182 taxa have been found in the study area, including 25 rare and WKH indicator species. The highest species richness occurs on the forest floor. Since 1931, much of the previous meadow habitat has overgrown to forest. Forests have become more shaded and substrate diversity has likely increased, leading to an increased number of epiphytic and epixylic species. Nine meadow species have become extinct in the study area. Kokkuvõte: Moricsala saare looduskaitseala (Läti) brüofloorast Artikkel käsitleb 80 aasta jooksul toimunud muutusi Moricsala saare brüoflooras. Saare brüofloorat uuriti aastatel 1931, 1979 ja 2006. Kokku on leitud 82,3 ha suuruselt saarelt 182 samblataksonit, nende seas 25 haruldast ja metsade vääriselupaikade tunnusliiki. Suurim liigirikkus valitseb maapinna sammalde hulgas. Kaheksakümne aasta jooksul on suur osa endistest niitudest metsastunud. Üheksa niiduliiki on saarelt kadunud. Metsad on muutunud varjulisemateks ja epifüütsete ning epiksüülsete sammalde arvu kasv viitab substraatide mitmekesisuse suurenemisele.
The aim of this study was to describe bryophyte communities on three substrate types (living tree... more The aim of this study was to describe bryophyte communities on three substrate types (living tree stem, decaying log, forest floor) in natural deciduous tree forest stands in a small-scale heterogeneous habitat. In total, six liverwort and 42 moss species were recorded. Bryophyte community composition and species richness were strongly related to forest stand properties (forest age, soil moisture, and tree species) and substrate pH value. Most of the recorded woodland key habitat indicator species occurred on living tree stems in Quercus robur and Tilia cordata forest stands. The highest bryophyte species richness was observed on decaying trees in the successional stage from epiphytic to epigeous species communities. As the forest floor layer was not suitable for epigeous bryophytes on Ozolu Island, many of these species occurred on decaying logs.
Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences., 2021
Broad-leaved trees play an important role in supporting epiphyte richness in deciduous forests. I... more Broad-leaved trees play an important role in supporting epiphyte richness in deciduous forests. In this study we tested which broad-leaved forest stands in terms of tree composition best predicted biodiversity in regard to bryophyte species number and their functional traits. The bryoflora was surveyed in 70 stands differing in dominant broad-leaved tree species. One circular plot with diameter 30 meters was established in each stand situated in different parts of Latvia. Fifty-three of the plots were located in stands identified as protected habitats of the European Union. In total, 82 bryophyte species were recorded. At plot level the total number of species ranged between 6 and 38 species. Using principal component analysis (PCA), the ordination axes explained 41% of the variation in composition of bryophytes. The PCA axes were related to tree species composition. The presence of broad-leaved trees, especially ash, lime, and oak, was connected with higher species richness. Genera...
Journal of Bryology, 2013
ABSTRACT Bryophyte species composition, richness and life-form distributions were studied in a su... more ABSTRACT Bryophyte species composition, richness and life-form distributions were studied in a succession after termination of land-use as meadows and pasture in the Moricsala Strict Nature Reserve. Detailed lists of bryophyte species in various vegetation types, which were produced in the early 1900s by Karl Reinhold Kupffer, were compared with those prepared from 2006 to 2010 to determine changes in species composition. Colonisations and extinctions of bryophyte species and life forms could be explained by increases in available substrates (living trees, dead wood, ground layer disturbance patches), and increasingly shaded conditions. In each forest type, the species diversity (alpha diversity) increased, but the differences (beta diversity) between the types decreased. The total number of bryophyte species recorded in the studied forest area increased from 110 to 134 and that of rare (including Woodland Key Habitat indicator species) and protected species from 14 to 21 species. Twenty species were lost during the forest succession, but most of these species still occur within the reserve in open habitats. Life forms such as small compact cushions and short turfs tended to be lost during the forest succession, while smooth and rough mat life forms were better adapted to the new conditions and increased in richness.
Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were ... more Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were determined using historical records and recent data. Detailed studies of the bryoflora on Moricsala were published in 1931 and 1979. A recent study was carried out starting in 2006, in which bryophytes were recorded separately on different substrates. In total, 182 taxa have been found in the study area, including 25 rare and WKH indicator species. The highest species richness occurs on the forest floor. Since 1931, much of the previous meadow habitat has overgrown to forest. Forests have become more shaded and substrate diversity has likely increased, leading to an increased number of epiphytic and epixylic species. Nine meadow species have become extinct in the study area.
Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were ... more Changes in the bryophyte flora in the Moricsala Island Nature Reserve over a 80-year period were determined using historical records and recent data. Detailed studies of the bryoflora on Moricsala were published in 1931 and 1979. A recent study was carried out starting in 2006, in which bryophytes were recorded separately on different substrates. In total, 182 taxa have been found in the study area, including 25 rare and WKH indicator species. The highest species richness occurs on the forest floor. Since 1931, much of the previous meadow habitat has overgrown to forest. Forests have become more shaded and substrate diversity has likely increased, leading to an increased number of epiphytic and epixylic species. Nine meadow species have become extinct in the study area. Kokkuvõte: Moricsala saare looduskaitseala (Läti) brüofloorast Artikkel käsitleb 80 aasta jooksul toimunud muutusi Moricsala saare brüoflooras. Saare brüofloorat uuriti aastatel 1931, 1979 ja 2006. Kokku on leitud 82,3 ha suuruselt saarelt 182 samblataksonit, nende seas 25 haruldast ja metsade vääriselupaikade tunnusliiki. Suurim liigirikkus valitseb maapinna sammalde hulgas. Kaheksakümne aasta jooksul on suur osa endistest niitudest metsastunud. Üheksa niiduliiki on saarelt kadunud. Metsad on muutunud varjulisemateks ja epifüütsete ning epiksüülsete sammalde arvu kasv viitab substraatide mitmekesisuse suurenemisele.