SWS Academic Research eLibraryEarth & Planetary Sciences

Browse

Search Results

Now showing 1 - 4 of 4

Author publications

Andis Kalvāns

4 linked publication records · University of Latvia

Author: Andis Kalvānsclear all
Showing 1-4 of 4 records
1
SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022, Water Resources. Forest, Marine and Ocean Ecosystems
Publication

SOIL WATERLOGGING STRESS COMPENSATED BY ROOT SYSTEM ADAPTATION IN A POT EXPERIMENT WITH SWEET CORN ZEA MAYS VAR. SACCHARATE

(STEF92 Technology, 2022-11-15, Andis Kalvāns, Gunta Kalvāne)

Show more

Soil waterlogging due to excess moisture resulting in hypoxic soil conditions can have detrimental effect on development of many dryland plants growing in locations with temporary water logged soils. Oxygen stress in hypoxic soils can lead to decrease root water uptake and transpiration compared to well aerated soil conditions. In turn reduction of transpiration have a positive effect on soil water budget facilitating the preservation of waterlogged state of the soil. We investigate this phenomenon in a greenhouse...

Hydrology and Water Resources2022
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Ecology, Economics, Education and Legislation
Publication

PHENOLOGY OF SPRING BARLEY (HORDEUM VULGARE) CULTIVARS REFLECT ADAPTION TO CLIMATE CHANGE: CASE STUDY OF PRIEKULI, LATVIA, 1928-2019

(STEF92 Technology, 2021-12-20, Gunta Kalvāne, Liga Dzedule, Andis Kalvāns)

Show more

Climate change is having a major impact on the agricultural sector, affecting crop phenology and yields. The spring barley is one of the three major crops in Baltic region. The study has analysed the phenological phases of spring barley (Hordeum vulgare), evaluating the onset of three phases, sowing, heading and fully ripe, and the duration between phases over a near century (1928–2019) in Priekuli, Latvia. We have evaluated application of a phenological model for different varieties of spring barley. Air temperat...

Ecology and Environmental Protection2021
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining
Publication

SEDIMENT DISPERSION IN A LARGE ICE-CONTACT LAKE RECONSTRUCTED FROM A VARVE RECORD: PARNU BAY REGION, ESTONIA

(STEF92 Technology, 2018-06-20, Andis Kalvāns)

Show more

Interpretation of climate change and deglaciation events from palaeovarves requires a complete understanding of varve composition, depositional environments and the non-climatic events that may influence varve thickness record. We examined a Baltic Ice Lake varve-thickness chronology from western Estonia, eastern Baltic Sea, composed of 26 individual varve series and spanning 584 years of Late Weichselian deglaciation. The direction (azimuth) to the increasing seasonal layer thickness and correlation between the w...

Ecology and Environmental Protection2018
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Water Resources. Forest, Marine and Ocean Ecosystems
Publication

TIMING OF SPRING PHENOLOGICAL PHASES OF BIRD CHERRY AND SILVER BIRCH UNDER CLIMATE CHANGE IN 21ST CENTURY IN LATVIA

(STEF92 Technology, 2018-06-20, Andis Kalvāns)

Show more

Phenology is a study of timing of event taking place in nature. In a functional ecosystem phenological phases for mutually dependent are synchronized. In a rapidly changing climate there is a risk of decoupling, that is spring development of interdependent could species proceed at different peace. We are investigating the likely timing of spring phenological phases during the last and upcoming centuries for two tree species common in northern and central Europe: bird cherry (Prunus padus known also as Padus racemo...

Forest Ecosystems2018
Showing 1-4 of 4 records
1