Estimation of Biomass Increase and CUE at a Young Temperate Scots Pine Stand Concerning Drought Occurrence by Combining Eddy Covariance and Biometric Methods

The accurate estimation of an increase in forest stand biomass has remained a challenge. Traditionally, in situ measurements are done by inventorying a number of trees and their biometric parameters such as diameter at the breast height (DBH) and height; sometimes these are complemented by carbon (C) content studies. Here we present the estimation of net primary productivity (NPP) over a two years period (2019–2020) at a 25-year-old Scots pine stand. Research was based on allometric equations made by direct biomass analysis (tree extraction) and carbon content estimations in individual components of sampled trees, combined with a series of stem diameter increments recorded by a network of band dendrometers. Site-specific allometric equations were obtained using two different approaches: using the whole tree biomass vs DBH (M1), and total dry biomass-derived as a sum of the results from individual tree components’ biomass vs DBH (M2). Moreover, equations for similar forest stands from the literature were used for comparison. Gross primary productivity (GPP) estimated from the eddy-covariance measurements allowed the calculation of carbon use efficiency (CUE = NPP/GPP). The two investigated years differed in terms of the sum and patterns of precipitation distribution, with a moderately dry year of 2019 that followed the extremely dry 2018, and the relatively average year of 2020. As expected, a higher increase in biomass was recorded in 2020 compared to 2019, as determined by both allometric equations based on in situ and literature data. For the former approach, annual NPP estimates reached ca. 2.0–2.1 t C ha−1 in 2019 and 2.6–2.7 t C ha−1 in 2020 depending on the “in situ equations” (M1-M2) used, while literature-derived equations for the same site resulted in NPP values ca. 20–30% lower. CUE was higher in 2020, which resulted from a higher NPP total than in 2019, with lower summer and spring GPP in 2020. However, the CUE values were lower than those reported in the literature for comparable temperate forest stands. A thorough analysis of the low CUE value would require a full interpretation of interrelated physiological responses to extreme conditions

A tiling microarray for global analysis of chloroplast genome expression in cucumber and other plants

Plastids are small organelles equipped with their own genomes (plastomes). Although these organelles are involved in numerous plant metabolic pathways, current knowledge about the transcriptional activity of plastomes is limited. To solve this problem, we constructed a plastid tiling microarray (PlasTi-microarray) consisting of 1629 oligonucleotide probes. The oligonucleotides were designed based on the cucumber chloroplast genomic sequence and targeted both strands of the plastome in a non-contiguous arrangement. Up to 4 specific probes were designed for each gene/exon, and the intergenic regions were covered regularly, with 70-nt intervals. We also developed a protocol for direct chemical labeling and hybridization of as little as 2 micrograms of chloroplast RNA. We used this protocol for profiling the expression of the cucumber chloroplast plastome on the PlasTi-microarray. Owing to the high sequence similarity of plant plastomes, the newly constructed microarray can be used to study plants other than cucumber. Comparative hybridization of chloroplast transcriptomes from cucumber, Arabidopsis, tomato and spinach showed that the PlasTi-microarray is highly versatile

Warmer spring alleviated the impacts of 2018 European summer heatwave and drought on vegetation photosynthesis

Future projections of climate extremes are expected to become more frequent. Parts of Europe experienced an extensive heatwave and drought during 2018. However, its impacts on terrestrial carbon cycle remain elusive. Here we investigated the vegetation responses to the heatwave and drought during 2018 based on satellite solar-induced chlorophyll fluorescence (SIF) and near-infrared reflectance (NIRv) data, which were used to estimate gross primary productivity (GPP). Results showed that there were no significant (p= 0.60) reductions in GPP across most of Europe during April-August of 2018. The higher temperatures in spring enhanced vegetation GPP, largely alleviated the negative impacts of heatwave and drought on vegetation photosynthesis during the subsequent summer, which resulted in evident compensation effects. Concurrently, warmer spring also had lagged effects by diminishing soil moisture, accompanied by scarce precipitation, leading to water stress on plant growth during summer. This observation-based study highlights the need for more considerations of seasonal compensation and lagged effects on the interactions between climate extreme events and biosphere.Peer reviewe

Comparison of local and systemic inflammatory markers in patients with community-acquired pneumonia and pneumonia coexisting with lung cancer

Background: The aim of the study was to compare the local and systemic markers of inflammatory processes in patients with community-acquired pneumonia (CAP) and in those with pneumonia coexisting with lung cancer. Material and methods: Seventeen patients with community-acquired pneumonia (group I), 14 patients with pneumonia and lung cancer (group II), and 24 patients with lung cancer (group III) were enrolled into the study. Sixteen healthy smokers served as a control group (group IV). Concentration of hydrogen peroxide (H2O2), vascular endothelial growth factor (VEGF) and tumor necrosis factor alpha (TNF-&#945;) were measured in exhaled breath condensate (EBC). The levels of VEGF and TNF-&#945; were also measured in serum. Results: The concentrations of VEGF (317.83 &#177; 77.78) and TNF-&#945; (1.98 &#177; 0.13) in EBC were significantly higher in patients with pneumonia and lung cancer as compared to patients with community-acquired pneumonia (VEGF 30.20 &#177; 6.56; TNF-&#945; 0.31 &#177; 0.05). Also the level of H2O2 (0.96 &#177; 0.16) in EBC in patients with pneumonia and lung cancer was elevated in comparison to patients with CAP (0.66 &#177; 0.09), however the difference was not statistically significant (p > 0.05). The serum concentrations of both studied cytokines were significantly higher in patients with pneumonia (VEGF 1112.62 &#177; &#177; 244.38 and TNF-&#945; 2.6 &#177; 0.48) than in those with pneumonia and lung cancer (VEGF 392.9 &#177; 78.2; TNF-&#945; 1.6 &#177; 0.2). Conclusions: Patients with pneumonia and lung cancer exhibited higher levels of oxidative stress and local inflammatory reactions than those with pneumonia. However, inflammatory markers in serum were significantly lower in patients with pneumonia and lung cancer as compared to those with CAP. Pneumonol. Alergol. Pol. 2011; 79, 2: 90-98Wstęp: Celem pracy było porównanie markerów lokalnych i systemowych procesów zapalnych u chorych na pozaszpitalne zapalenie płuc (CAP) oraz zapalenie płuc współistniejące z rakiem płuca. Materiał i metody: Badania przeprowadzono u 17 chorych na pozaszpitalne zapalenie płuc (I grupa), 14 chorych na zapalenie płuc współistniejące z rakiem płuca (II grupa), 24 chorych na raka płuca (III grupa) oraz u 16 osób zdrowych (IV grupa - kontrolna). Oceniano stężenie nadtlenku wodoru (H2O2), naczyniowo-śródbłonkowego czynnika wzrostu (VEGF) i czynnika martwicy nowotworów &#945; (TNF-&#945;) w kondensacie powietrza wydechowego (EBC) oraz stężenie VEGF i TNF-&#945; w surowicy. Wyniki: U chorych na zapalenie płuc współistniejące z rakiem płuca stwierdzono znamiennie wyższe stężenie VEGF (317,83 &#177; 77,78) i TNF-&#945; (1,98 &#177; 0,13) w kondensacie powietrza wydechowego w porównaniu z chorymi na pozaszpitalne zapalenie płuc (VEGF 30,20 &#177; 6,56; TNF-&#945; 0,31 &#177; 0,05). Choć stężenie H2O2 (0,96 &#177; 0,16) w EBC u chorych na zapalenie płuc współistniejące z rakiem płuca było wyższe niż stężenie występujące u chorych na CAP (0,66 &#177; 0,09), to jednak różnica nie osiągnęła istotności statystycznej (p < 0,05). Natomiast u chorych na pozaszpitalne zapalenie płuc obserwowano istotnie wyższe stężenie obu badanych cytokin w surowicy krwi (VEGF 1112,62 &#177; 244,38 i TNF-&#945; 2,6 &#177; 0,48) w porównaniu z chorymi na zapalenie płuc ze współistniejącym rakiem płuca (VEGF 392,9 &#177; 78,2; TNF-&#945; 1,6 &#177; 0,2). Wnioski: Chorych na zapalenie płuc współistniejące z rakiem płuca charakteryzuje wyraźna tendencja do nasilonego miejscowego stresu oksydacyjnego oraz znamiennie wzmożona lokalna reakcja zapalna w porównaniu z chorymi na pozaszpitalne zapalenie płuc. Natomiast systemowa reakcja zapalna u chorych na zapalenie płuc wraz ze współistniejącym rakiem płuca jest wyraźnie zmniejszona w stosunku do chorych na CAP. Pneumonol. Alergol. Pol. 2011; 79, 2: 90-9

Winter respiratory C losses provide explanatory power for net ecosystem productivity

Accurate predictions of net ecosystem productivity (NEPc) of forest ecosystems are essential for climate change decisions and requirements in the context of national forest growth and greenhouse gas inventories. However, drivers and underlying mechanisms determining NEPc (e.g., climate and nutrients) are not entirely understood yet, particularly when considering the influence of past periods. Here we explored the explanatory power of the compensation day (cDOY)defined as the day of year when winter net carbon losses are compensated by spring assimilationfor NEPc in 26 forests in Europe, North America, and Australia, using different NEPc integration methods. We found cDOY to be a particularly powerful predictor for NEPc of temperate evergreen needleleaf forests (R-2=0.58) and deciduous broadleaf forests (R-2=0.68). In general, the latest cDOY correlated with the lowest NEPc. The explanatory power of cDOY depended on the integration method for NEPc, forest type, and whether the site had a distinct winter net respiratory carbon loss or not. The integration methods starting in autumn led to better predictions of NEPc from cDOY then the classical calendar method starting 1 January. Limited explanatory power of cDOY for NEPc was found for warmer sites with no distinct winter respiratory loss period. Our findings highlight the importance of the influence of winter processes and the delayed responses of previous seasons' climatic conditions on current year's NEPc. Such carry-over effects may contain information from climatic conditions, carbon storage levels, and hydraulic traits of several years back in time.Peer reviewe

Seniorzy w społeczeństwie XXI wieku. Materiały konferencyjne III Galicyjskich Spotkań Medycznych

Z przedmowy: "Naturalną koleją rzeczy wszyscy ku niej zmierzamy. Starość jest równie nieuchronna jak kolejna pora roku. A jednak na co dzień wolimy o niej nie myśleć, nie lubimy o niej mówić. W dzisiejszym świecie, kiedy liczy się przede wszystkim młodość, powodzenie, osobisty sukces, starość zazwyczaj kojarzy się z odchodzeniem na margines życia, dolegliwościami ciała, z samotnością. Czas mija, a my łudzimy się, że mija dla innych, nie dla nas, że my sami nadal jesteśmy młodzi. Aż pewnego dnia nieoczekiwanie jakiś dobrze wychowany młody człowiek z wymownym spojrzeniem ustępuje nam miejsca w tramwaju... Jak godzimy się z upływem czasu, co robimy, żeby przygotować się do tego, jacy będziemy za kilka, kilkanaście, kilkadziesiąt lat, żebyśmy nie czuli się zaskoczeni, żeby nie pozostało nam tylko gorzkie „a nie mówiłem” i poczucie zmarnowanych życiowych szans? Jak dziś odnosimy się do naszych seniorów w rodzinach, w najbliższym otoczeniu, w społeczeństwie, do którego należymy? Stoi przed nami wiele trudnych zadań."(...

Carbon-nitrogen interactions in European forests and semi-natural vegetation - Part 1: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling

The impact of atmospheric reactive nitrogen (N$_{r}$) deposition on carbon (C) sequestration in soils and biomass of unfertilized, natural, semi-natural and forest ecosystems has been much debated. Many previous results of this dC/dN response were based on changes in carbon stocks from periodical soil and ecosystem inventories, associated with estimates of N$_{r}$ deposition obtained from large-scale chemical transport models. This study and a companion paper (Flechard et al., 2020) strive to reduce uncertainties of N effects on C sequestration by linking multi-annual gross and net ecosystem productivity estimates from 40 eddy covariance flux towers across Europe to local measurement-based estimates of dry and wet N$_{r}$ deposition from a dedicated collocated monitoring network. To identify possible ecological drivers and processes affecting the interplay between C and N$_{r}$ inputs and losses, these data were also combined with in situ flux measurements of NO, N$_{2}$O and CH$_{4}$ fluxes; soil NO$_{3}$̅ leaching sampling; and results of soil incubation experiments for N and greenhouse gas (GHG) emissions, as well as surveys of available data from online databases and from the literature, together with forest ecosystem (BASFOR) modelling. Multi-year averages of net ecosystem productivity (NEP) in forests ranged from -70 to 826 gCm$^{-2}$ yr$^{-1}$ at total wet+dry inorganic N$_{r}$ deposition rates (N$_{dep}$) of 0.3 to 4.3 gNm$^{-2}$ yr$^{-1}$ and from -4 to 361 g Cm$^{-2}$ yr$^{-1}$ at N$_{dep}$ rates of 0.1 to 3.1 gNm$^{-2}$ yr$^{-1}$ in short semi-natural vegetation (moorlands, wetlands and unfertilized extensively managed grasslands). The GHG budgets of the forests were strongly dominated by CO$_{2}$ exchange, while CH$_{4}$ and N$_{2}$O exchange comprised a larger proportion of the GHG balance in short semi-natural vegetation. Uncertainties in elemental budgets were much larger for nitrogen than carbon, especially at sites with elevated N$_{dep}$ where N$_{r}$ leaching losses were also very large, and compounded by the lack of reliable data on organic nitrogen and N$_{2}$ losses by denitrification. Nitrogen losses in the form of NO, N$_{2}$O and especially NO$_{3}$̅ were on average 27%(range 6 %–54 %) of N$_{dep}$ at sites with N$_{dep}$ 3 gNm$^{-2}$ yr$^{-1}$. Such large levels of N$_{r}$ loss likely indicate that different stages of N saturation occurred at a number of sites. The joint analysis of the C and N budgets provided further hints that N saturation could be detected in altered patterns of forest growth. Net ecosystem productivity increased with N$_{r}$ deposition up to 2–2.5 gNm$^{-2}$ yr$^{-1}$, with large scatter associated with a wide range in carbon sequestration efficiency (CSE, defined as the NEP = GPP ratio). At elevated N$_{dep}$ levels (> 2.5 gNm$^{-2}$ yr$^{-1}$), where inorganic N$_{r}$ losses were also increasingly large, NEP levelled off and then decreased. The apparent increase in NEP at low to intermediate N$_{dep}$ levels was partly the result of geographical cross-correlations between N$_{dep}$ and climate, indicating that the actual mean dC/dN response at individual sites was significantly lower than would be suggested by a simple, straightforward regression of NEP vs. N$_{dep}$

Global maps of soil temperature

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km2 resolution for 0–5 and 5–15 cm soil depth. These maps were created by calculating the difference (i.e. offset) between in situ soil temperature measurements, based on time series from over 1200 1-km2 pixels (summarized from 8519 unique temperature sensors) across all the world\u27s major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (−0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications

Global maps of soil temperature

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km² resolution for 0–5 and 5–15 cm soil depth. These maps were created by calculating the difference (i.e., offset) between in-situ soil temperature measurements, based on time series from over 1200 1-km² pixels (summarized from 8500 unique temperature sensors) across all the world’s major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (-0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in-situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications