Phenological trends of multi-taxonomic groups in Latvia, 1970–2018

Kalvāne, Gunta; Kalvāns, Andis

doi:10.1007/s00484-020-02068-8

Cited by 5 publications

(6 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So-called thermal time or degree day models are often used to predict the leaf-out dates [64,65]. This is consistent with the negative (early) trend for leaf-out dates in the study region [66]. There are some suggestions that the atmospheric water vapor pressure is a similarly important driver of spring phenology, but it is largely correlated with air temperature [67].…”

Section: Leaf Area Index (Lai) Seasonal Trajectory Modelsupporting

confidence: 66%

Hydrological Coupling and Decoupling of Hydric Hemiboreal Forest Sites Inferred from Soil Water Models and Tree-Ring Chronology

Kalvāns,

Dauškane

2023

Forests

Self Cite

View full text Add to dashboard Cite

The soil water regime often controls whether an ecosystem is a source of greenhouse gases such as CO2 or CH4 or is, instead, a carbon sink. The soil water regime of wetland forests is complicated by ecosystem feedback and landscape scale interactions. An in-depth understanding of these processes is needed to optimize the management of such ecosystems to balance timber production, carbon sequestration and biodiversity preservation. To investigate the soil water regime of non-riparian wetland forests, we set up a physically based Hydrus-1D soil water model for two hydric black alder Alnus glutinosa sites in a lowland hemiboreal setting informed by field observations of the soil water. Further, to gain ecohydrological insights, we explored the correlations between modeled long-term soil water parameters and local dendrochronology. We found that, at the clay soil site, the simulated root water uptake had a significant correlation (up to 0.55) with the residual tree-ring chronology. However, in the sandy soil site, the meteorological conditions—air temperature and precipitation—were better predictors for tree radial growth (correlation up to 0.42). In addition, we observed a trend towards dryer conditions during the modeling period, which might enhance the growing conditions for the considered forest stands due to a reduction in soil waterlogging.

show abstract

Section: Leaf Area Index (Lai) Seasonal Trajectory Modelsupporting

confidence: 66%

Hydrological Coupling and Decoupling of Hydric Hemiboreal Forest Sites Inferred from Soil Water Models and Tree-Ring Chronology

Kalvāns,

Dauškane

2023

Forests

Self Cite

View full text Add to dashboard Cite

show abstract

“…Changes in meteorological parameters in Latvia have had an impact on both wild and crop phenology (Kalvāne and Kalvāns, 2021) including at the Pūre orchard. Air temperatures in Latvia increased by 0.7 • C between 1961 and 2010; the most significant changes were found for the winter and spring seasons (Avotniece et al, 2017), which have had the most direct impact on plants' phenological development.…”

Section: Phenological Changes Of Malus Domesticamentioning

confidence: 99%

Full flowering phenology of apple tree (<i>Malus domestica</i>) in Pūre orchard, Latvia from 1959 to 2019

2021

Self Cite

View full text Add to dashboard Cite

Abstract. The Pūre orchard is one of the oldest apple orchards in the Baltic, where thousands of varieties of fruit trees from throughout the world are grown and tested. Over time, a huge knowledge base has been accumulated, but most of the observational data are stored in archives in paper format. We have digitized a small part of the full flowering phenological data of apple trees (Malus domestica) over the period of 1959 to 2019 for 17 varieties of apple trees, a significant step for horticulture and agricultural economics in Latvia. Climate change has led to significant changes in the phenology of apple trees as all varieties, autumn, summer and winter, have begun to flower earlier: from 2002 to 2019, on average full flowering was recorded to have taken place around 21 May, whereas for the period 1959–1967 it occurred around 27–28 May. To develop better-quality phenological predictions and to take account of the fragmentary nature of phenological data, in our study we assessed the performance of three meteorological data sets – gridded observation data from E-OBS, ERA5-Land reanalysis data and direct observations from a distant meteorological station – in simple phenological degree-day models. In the first approximation, the gridded E-OBS data set performs best in our phenological model.

show abstract

“…There are two ways to solve this problem. The usual approach is to combine a series of observations from adjacent observation points, as has been done in the past (Kalvane et al, 2009). The second approach is to calibrate the phenological model using the available observation data set and to use, for example, gridded meteorological data (E-OBS), data of reanalysis, or operational meteorological models for regional calculations (Kalvāns et al, 2015;Wu et al, 2016).…”

Section: Data Limitationsmentioning

confidence: 99%

“…larger interannual variation. For example, the beginning of flowering of pioneer species (Kolářová et al, 2014) such as hazel (Corylus avellana) and grey alder (Alnus incana; BBCH61) in Latvia may occur from the end of December to the beginning of May (Kalvāne and Kalvāns, 2021). It should be noted that during recent years, the beginning of flowering can already be observed in March.…”

Section: Seasonality In the Landscapementioning

confidence: 99%

See 1 more Smart Citation

Long-term phenological data set of multi-taxonomic groups, agrarian activities, and abiotic parameters from Latvia, northern Europe

Kalvāne

Kalvāns

Ģērmanis³

2021

Earth Syst. Sci. Data

Self Cite

View full text Add to dashboard Cite

Abstract. A phenological data set collected by citizen scientists from 1970 to 2018 in Latvia is presented, comprising almost 47 000 individual observations of eight taxonomical groups, in addition to agrarian activities and abiotic parameters, covering in total 159 different phenological phases. These original data published offline in annual issues of the Nature and History Calendar (in Latvian, Dabas un vēstures kalendārs) have been digitized, harmonized, and geo-referenced. Overall, the possible use of such data is extensive, as phenological data are excellent bioindicators for characterizing climate change and can be used for the elaboration of adaptation strategies in agriculture, forestry, and environmental monitoring. The data can also be used in cultural–historical research; for example, the database includes data on sugar beet and maize, the cultivation of which was imposed on collective farms during the Soviet period. Thus, such data are not only important in the Earth sciences but can also be applied to the social sciences. The data significantly complement current knowledge on European phenology, especially regarding northern regions and the temporal biome. The data here cover two climate reference periods (1971–2000; 1981–2010), in addition to more recent years, and are particularly important in monitoring the effects of climate change. The database can be considered the largest open phenological data set in the Baltics. The data are freely available to all interested at https://doi.org/10.5281/zenodo.3982086 (Kalvāne et al., 2020).

show abstract

Phenological trends of multi-taxonomic groups in Latvia, 1970–2018

Cited by 5 publications

References 37 publications

Hydrological Coupling and Decoupling of Hydric Hemiboreal Forest Sites Inferred from Soil Water Models and Tree-Ring Chronology

Hydrological Coupling and Decoupling of Hydric Hemiboreal Forest Sites Inferred from Soil Water Models and Tree-Ring Chronology

Full flowering phenology of apple tree (<i>Malus domestica</i>) in Pūre orchard, Latvia from 1959 to 2019

Long-term phenological data set of multi-taxonomic groups, agrarian activities, and abiotic parameters from Latvia, northern Europe

Contact Info

Product

Resources

About

Phenological trends of multi-taxonomic groups in Latvia, 1970–2018

Cited by 5 publications

References 37 publications

Hydrological Coupling and Decoupling of Hydric Hemiboreal Forest Sites Inferred from Soil Water Models and Tree-Ring Chronology

Hydrological Coupling and Decoupling of Hydric Hemiboreal Forest Sites Inferred from Soil Water Models and Tree-Ring Chronology

Full flowering phenology of apple tree (&lt;i&gt;Malus domestica&lt;/i&gt;) in Pūre orchard, Latvia from 1959 to 2019

Long-term phenological data set of multi-taxonomic groups, agrarian activities, and abiotic parameters from Latvia, northern Europe

Contact Info

Product

Resources

About

Full flowering phenology of apple tree (<i>Malus domestica</i>) in Pūre orchard, Latvia from 1959 to 2019