Climate change and plankton phenology in freshwater: current trends and future commitments

A solid body of empirical, experimental and theoretical evidence accumulated over recent years indicated that freshwater plankton experienced advance in phenology in response to climate change. Despite rapidly growing evidence for phenological changes, we still lack a comprehensive understanding of how climate change alters plankton phenology in freshwater. To overcome current limitations, we need to shed some light on trends and constraints in current research. The goal of this study is to identify current trends and gaps based on analysis of selected papers, by the help of which we can facilitate further advance in the field. We searched the literature for plankton phenology and confined our search to studies where climate change has been proposed to alter plankton phenology and rates of changes were quantified. We did not restrict our search for empirical ontributions; experimental and theoretical studies were considered as well. In the following we discuss the spatio-temporal setting of selected studies, contributions of different taxonomic groups, emerging methodological constraints, measures of phenological trends; and finally give a list of recommendations on how to improve our understanding in the field. The majority of studies were confined to deep lakes with a skewed geographical distribution toward Central Europe, where scientists have long been engaged in limnology. Despite these findings, recent studies suggest that plankton in running waters may experience change in phenology with similar magnitude. Average rate of advancement in phenology of freshwater plankton exceeded those of the marine plankton and the global average. Increasing study duration was not coupled either with increasing contribution of discontinuous data or with increasing rates of phenological changes. Future studies may benefit from i) delivering longterm data across scientific and political boundaries; ii) extending study sites to broader geographical areas with a more explicit consideration of running waters; iii) applying plankton functional groups; iv) increasing the application of satellite data to quantify phytoplankton bloom phenology; v) extending analyses of time series beyond the spring period; vi) using various metrics to quantify variation in phenology; vii) combining empirical, experimental and theoretical approaches; and last but not least viii) paying more attention to emergence dynamics, nonresponding species and trophic mismatch.

The Dialectics of Modernity - Recognizing Globalization. Studies on the Theoretical Perspectives of Globalization

The volume The Dialectics of Modernity - Recognizing Globalization. Studies on the Theoretical Perspectives of Globalization is the product of a work of that quarter of the century, which has been continuing, since 1989 up today, the true beginning of the globalization. Therefore, because that concept was not existing at that time, the work is not yet directed, in the first years, on the globalization itself. As it can be seen, this concept pushed through only in the second half of the nineties, when the concept could also be already statistically revealed in the world press. How a group of researchers from Hungary was enquirying during the nineties, according to partners of conversation at home and abroad, with whom one could talk about how the new world emerging with 1989 can actually be described, is a long story, the theory of which consists in the fact, that we apparently live in a world, where the most part of the people, even worse, even most of the intellectuals are hardly interested in how this one really looks like. On looking for partners, the circle of the authors of this volume was created. In Hungary, we quickly reached our limit (which much later did not prevent us from appearing, such as if we had always been living in the theoretically worked globalization). The French group around Jacques Poulain reacted the fastest way (and later around Francois de Bernard, with his particularly valuable homepage www.mondialisations.org), not much later the contact with the Russian colleagues around Alexandr Shumakov was created, in which Encyclopedia of the Globalization our contribution could already appear in 2003. On these traces, we came to the productive relationship with Leonid Grinin and Andrey Korotayev. Finally, we mention the Fürstenfeld's initiative, founded since 2009 with Melitta Becker's help in the framework of the Centre for the Interdisciplinary Research in this Austrian city. A relevant part of the author inside this book participated from the beginning in the work of the group. The individual contributions to this volume are linked together by a common interest in knowledge. This is the theoretical view of the phenomenon of the globalization. From the beginning, it was not further defined or limited to certain approaches, particularly an independent theory of the globalization was not intended. We started from the fact, that every legitimately revealed theoretical approach can contribute legitimately to a later theory of the globalization. In this way, the further contacts with Nico Stehr and the members of the Dresden group for the investigation of the security problems arose, mainly with Ernst Woit. Hegel defined the philosophy as the flight of the Owl of Minerva, which "begins its flight only with the falling twilight". Through the theoretical investigation of the globalization always becoming interdisciplinary, we wanted by no means to debate about this incomparable aphorism. We simply started from the conviction, that a new reality should not remain without any description.