Apostolos P. Kyriazopoulos

How pragmatism in environmental science and policy can undermine sustainability transformations: the case of marginalized mountain areas under climate and land-use change

Global warming, land-use change, mass tourism and a deteriorating socio-economic situation pose serious threats to the sustainability of mountain areas. The future development of these areas could be an example of the Great Transition scenario. Based on iterative and collaborative discussions with 60 treeline experts, we (1) envisioned plausible futures of treeline ecosystems in Europe and (2) explored the role of pragmatism in scenario development and use. The three global change scenario classes (Conventional Worlds, Barbarization, and Great Transitions) and four European scenarios (Economy First, Fortress Europe, Policy Rules, and Sustainability Eventually) were downscaled using the drivers-pressures-state-impact-response (DPSIR) framework. The scenarios that emerged, i.e., Global Markets, Self-sufficient Economies, Tyranny of Climate Governance, and Sustainable Use of Ecosystem Services, show that pragmatism can have either a propitious role or pernicious role in scenario analysis. Instead of being truly honest brokers, scenario producers are likely to manipulate, reconstruct, and change scientific knowledge to avoid socially and politically undesired trajectories. We showed by mathematical optimization that scenario users are likely to miss the Sustainable Use of Ecosystem Services scenario if they search within the pragmatic decision space which optimally justifies the two pre-existing global policies: climate policy and economic growth. We conclude that pernicious pragmatism leads to “the trap of the day”—a tendency of both users and producers of scenarios to use pre-existing policy agendas and scientific narratives as a pretext to promote their own objectives instead of being open to transformation in science and policy.

Effect of selenium on mineral content and nutritive value of Melilotus officinalis L.

Plants of Melilotus officinalis L. were subjected to two different treatments: a) no selenium (Se), and b) addition of 3 mg Se L−1 irrigation water for 45 days and samples of leaves, stems and roots were analyzed for Se, potassium (K), sodium (Na), magnesium (Mg), iron (Fe), copper (Cu), calcium (Ca), manganese (Mn) and zinc (Zn). Crude protein (CP) content, neutral detergent fiber (NDF), acid detergent fiber (ADF) and in vitro organic matter digestibility (IVOMD) were also estimated for the aerial plant tissues. In Se-treated plants Se mainly accumulated in leaf tissues, various changes in macronutrient concentrations were detected, while the micronutrient content decreased significantly. In addition, leaf CP, NDF and ADF content decreased, while IVOMD increased, possibly indicating ameliorated nutritive value. According to our findings, M. officinalis could be used either as a dietary supplement, in mixture with non-accumulator species, for livestock feed deficient in Se or for restoration of grasslands in seleniferous soils.

Defoliation frequency effects on winter forage production and nutritive value of different entries of Dactylis glomerata L.

Abstract The objective of this study was to evaluate the effect of different defoliation frequencies on winter forage production and nutritive value of improved populations of Dactylis glomerata L. Four entries: (a) base population, (b) selected plants from mass honeycomb selection (MHS), (c) selected plants from pedigree honeycomb selection (PHS), and (d) selected plants from pedigree honeycomb selection using the combined criterion CC = x 2 (1 ‐ CV)/CV (PHS(CC)) were tested under four defoliation frequencies: (1) frequent, (2) moderate, (3) infrequent, and (4) control. Dry matter (DM) production under the frequent and moderate defoliation frequencies was 17% and 7% respectively more than under infrequent defoliation in the first year. However, in the second year, DM production under infrequent defoliation was 41% and 46% higher than under frequent and moderate defoliation, respectively. The DM production of the selected populations (b, c and d) of D. glomerata consistently exceeded that of the base population (a) under various defoliation frequency regimes during winter. Among the selected entries, MHS and PHS(CC) had consistently higher DM production than PHS for the two experimental years. Under increased defoliation frequencies, crude protein content significantly increased and neutral detergent fibre and acid detergent fibre significantly decreased compared with the control defoliation treatment in both years. There were no significant differences (P > 0.05) in nutritive value among the entries. Generally, DM production was more stable under infrequent defoliation, while nutritive value met the demands of small ruminants for maintenance and lactation.