scholarly journals Anthropogenically induced environmental changes in the northeastern Adriatic Sea in the last 500 years (Panzano Bay, Gulf of Trieste)

2016 ◽  
Vol 13 (21) ◽  
pp. 5965-5981 ◽  
Author(s):  
Jelena Vidović ◽  
Rafał Nawrot ◽  
Ivo Gallmetzer ◽  
Alexandra Haselmair ◽  
Adam Tomašových ◽  
...  
Keyword(s):  
Trace Element ◽  
20Th Century ◽  
Human Impacts ◽  
Marine Ecosystems ◽  
Anthropogenic Activity ◽  
Anthropogenic Pressure ◽  
Industrial Activities ◽  
Gulf Of Trieste ◽  
Element Concentrations ◽  
History Of

Abstract. Shallow and sheltered marine embayments in urbanized areas are prone to the accumulation of pollutants, but little is known about the historical baselines of such marine ecosystems. Here we study foraminiferal assemblages, geochemical proxies and sedimentological data from 1.6 m long sediment cores to uncover  ∼  500 years of anthropogenic pressure from mining, port and industrial activities in the Gulf of Trieste, Italy. From 1600 to 1900 AD, normalized element concentrations and foraminiferal assemblages point to negligible effects of agricultural activities. The only significant anthropogenic activity during this period was mercury mining in the hinterlands of the gulf, releasing high amounts of mercury into the bay and significantly exceeding the standards on the effects of trace elements on benthic organisms. Nonetheless, the fluctuations in the concentrations of mercury do not correlate with changes in the composition and diversity of foraminiferal assemblages due to its non-bioavailability. Intensified agricultural and maricultural activities in the first half of the 20th century caused slight nutrient enrichment and a minor increase in foraminiferal diversity. Intensified port and industrial activities in the second half of 20th century increased the normalized trace element concentrations and persistent organic pollutants (PAH, PCB) in the topmost part of the core. This increase caused only minor changes in the foraminiferal community because foraminifera in Panzano Bay have a long history of adaptation to elevated trace element concentrations. Our study underlines the importance of using an integrated, multidisciplinary approach in reconstructing the history of environmental and anthropogenic changes in marine systems. Given the prolonged human impacts in coastal areas like the Gulf of Trieste, such long-term baseline data are crucial for interpreting the present state of marine ecosystems.

scholarly journals Anthropogenically induced environmental changes in the northeastern Adriatic Sea in the last 400 years (Panzano Bay, Gulf of Trieste)

2016 ◽  
Author(s):  
Jelena Vidović ◽  
Rafał Nawrot ◽  
Ivo Gallmetzer ◽  
Alexandra Haselmair ◽  
Adam Tomašových ◽  
...  
Keyword(s):  
Trace Element ◽  
20Th Century ◽  
Human Impacts ◽  
Sediment Quality ◽  
Marine Ecosystems ◽  
Anthropogenic Activity ◽  
Anthropogenic Pressure ◽  
Gulf Of Trieste ◽  
Element Concentrations ◽  
History Of

Abstract. Shallow and sheltered marine embayments in urbanized areas are prone to the accumulation of pollutants, but little is known about the historical baselines of such marine ecosystems. Here we study foraminiferal assemblages, geochemical proxies and sedimentological data from 1.6 m long sediment cores to uncover ~ 400 years of anthropogenic pressure from mining, port and industrial zones in the Gulf of Trieste, Italy. From 1600 to 1900 AD, element concentrations and foraminiferal assemblages point to negligible effects of agricultural activities. The only significant anthropogenic activity during this period is mercury mining in the hinterlands of the gulf, releasing high amounts of mercury into the bay and significantly exceeding today's Italian sediment quality guidelines (SQG) and the standards on the effects of trace elements to benthic organisms (ERL and ERM). Nonetheless, the fluctuations in the concentrations of mercury do not correlate with changes in the composition and diversity of foraminiferal assemblages due to its nonbioavailability. Intensified agricultural and maricultural activities in the first half of the 20th century caused slight nutrient enrichment and a minor increase in foraminiferal diversity. Intensified port and industrial activities in the second half of 20th century increased the normalised trace element concentrations and persistent organic pollutants (PAH, PCB) in the topmost part of the core, with solely Ni exceeding Italian SQG, ERL and ERM. This increase caused only minor changes in the foraminiferal community because foraminifera in Panzano Bay have a long history of adaptation to naturally elevated trace element concentrations. Our study underlines the importance of using an integrated, multidisciplinary approach in reconstructing the history of environmental and anthropogenic changes in marine systems. Given the prolonged human impacts in coastal areas like the Gulf of Trieste, such long term baseline data are crucial for interpreting the present state of marine ecosystems.

Geochemical peat records from the Great Vasyugan Mire and Tomsk region, Siberia. Regional temporal trend of human impact over the last 500 years and local perturbations.

2021 ◽  
Author(s):  
Simon Hutchinson ◽  
Andrei Diaconu ◽  
Sergey Kirpotin ◽  
Angelica Feurdean
Keyword(s):  
Trace Element ◽  
Forest Cover ◽  
Human Impacts ◽  
Global Scale ◽  
Testate Amoeba ◽  
Dust Deposition ◽  
Peat Core ◽  
Element Concentrations ◽  
Local Perturbations ◽  
Geochemical Profile

<p>Although interest in peatland environments, especially in terms of their carbon storage, has gained momentum in response to a heightened awareness of the climate emergency; significant gaps remain in the geographical coverage of our knowledge of mires, including some major wetland systems. This paucity has implications, not only for our understanding of their development and functioning, but also for adequately predicting future changes and thus providing effective mire environmental management. Our INTERACT-supported study provides radiometrically dated, well-characterised millennial scale peat records from two contrasting undisturbed and impacted (ditched) ombrotrophic sites in the Great Vasyugan Mire (GVM) near Tomsk, Siberia and two additional mesotrophic sites to the east of the Ob river. In addition, the geochemical record was complemented by multiproxy palaeoecological characterisation (pollen, charcoal, stable isotopes, testate amoeba). We identified both natural (lithogenic) and anthropogenic geochemical signals recording human impacts with site specific variations. Elevated trace element concentrations in the peat profiles align with the region’s wider agricultural and economic development following the colonisation of Siberia by Russia (from ca. 1600 AD) when pollen assemblages indicate the decline of forest cover and an increase in human disturbance, including the use for fire. Trace element concentrations peak with the subsequent, post WWII industrialisation of regional centres in southern Siberia (after 1950 AD). On a global scale, our sites, together with evidence from the few other comparable studies in the region, suggest that the region’s peatlands are relatively uncontaminated by human activities with a mean lead (Pb) level of < 5 mg/kg. However, via lithogenic elements including Rb, Ti and Zr, we detected both a geochemical signal as a result of historical land cover changes enhancing mineral dust deposition following disturbance, as well as fossil fuel derived pollutants as relatively elevated, subsurface As and Pb concentrations of ca. 10 and 25 mg/kg respectively with the development of industry in the region. Nevertheless, the potential significance of local factors on the sites’ geochemical profile is also highlighted. For example, we identify the effects of past peat drainage for afforestation (ca. 1960s) and the scheme’s subsequent abandonment. Although the region’s mire systems are remote and vast, they appear to hold a legacy of human activity that can be detected as a geochemical signal supporting the inferences of other palaeoenvironmental proxies. Such geochemical peat core records, from Eurasia in particular, remain relatively scarce in the international scientific literature and therefore, as yet, inadequately characterised and quantified compared to other regions.</p>

A geochemical peat record from the Great Vasyugan Mire, Tomsk, Siberia evidencing a regionally coherent pattern of human impact over the last five centuries.

2020 ◽  
Author(s):  
Simon Hutchinson ◽  
Andrei Diaconu ◽  
Sergey Kirpotin ◽  
Angelica Feurdean
Keyword(s):  
Trace Element ◽  
Forest Cover ◽  
Human Impacts ◽  
Time Frame ◽  
Global Scale ◽  
Climatic Conditions ◽  
Dust Deposition ◽  
Peat Core ◽  
Element Concentrations ◽  
Spatial Coverage

<p>Interest in peatland environments, especially in terms of their carbon storage, has increased markedly in response to the heightened awareness of future, global climatic conditions. However, significant gaps remain in the spatial coverage of our knowledge of mires; including some major wetland systems. This paucity has implications, not only for our understanding of their origins, development and functioning, but also for adequately predicting future changes and providing scientifically based recommendations for mire environmental management. Our INTERACT-supported study provides a radiometrically dated, well-characterised millennial-scale peat record from two contrasting undisturbed and impacted (ditched) sites, respectively in the Great Vasyugan Mire (GVM) near Tomsk, Siberia, which is reputedly the largest peat system in the world. In addition to their palaeoecological characterisation, we identified both natural (lithogenic) and anthropogenic geochemical signals recording human impacts with site-specific variations. Elevated trace element concentrations in both peat profiles align with the time frame of the region’s wider agricultural and economic development with the annexation of Siberia by Russia (from ca. 1600 AD) when pollen assemblage characteristics suggest a decline in forest cover and an increase in herbaceous plants associated with human disturbance. Trace element concentrations peak with the subsequent industrialisation of centres around the Ob river (after ca. 1950 AD). On a global scale, our sites, together with evidence from the few other comparable studies in the region, suggest that the GVM is relatively uncontaminated by human activities with a mean lead (Pb) level of < 4 mg/kg. However, via lithogenic elements including Rb, Ti and Zr we detected both a geochemical signal as a result of historical land cover changes, which enhanced mineral dust deposition following disturbance, as well as fossil fuel derived pollutants, as relatively elevated, subsurface As and Pb concentrations of ca. 10 and 25 mg/kg respectively, with the development of industry in the region. Moreover, we identify the local effects of drainage for afforestation (ca. 1960s) on the peat profile. At the impacted site, which was ditched, but subsequently abandoned, the influence of arrested peat growth on the site’s geochemical depth profile highlights the potential significance of local factors. Although relatively remote and vast, the GVM appears to hold a legacy of human activity that can be detected as a geochemical signal supporting the inferences of other palaeoenvironmental proxies. Such geochemical peat core records, from Eurasia in particular, remain relatively scarce in the international scientific literature. Therefore, our study contributes to an understanding of a less well known and, as yet, inadequately characterised and quantified region. </p>

The last marine wilderness: spearfishing for trophy fishes in the Coral Sea

2015 ◽  
Vol 43 (1) ◽  
pp. 90-95 ◽  
Author(s):  
MATTHEW A. L. YOUNG ◽  
SIMON FOALE ◽  
DAVID R. BELLWOOD
Keyword(s):  
Great Barrier Reef ◽  
Human Impacts ◽  
Marine Reserve ◽  
Marine Ecosystems ◽  
Small Scale ◽  
Barrier Reef ◽  
Pelagic Species ◽  
Coral Sea ◽  
History Of ◽  
First Time

SUMMARYIsolation can provide marine ecosystems with a refuge from human impacts. However, information on the biodiversity, ecology and fisheries of remote regions is often sparse. The proposed Coral Sea Marine Reserve could create one of the world's largest and most remote marine parks, yet little information is available to inform discussions. Fish captures from the Coral Sea and adjacent Great Barrier Reef (GBR) were assessed from reports contained in a chronology of spearfishing publications from 1953 to 2009, and reveal for the first time the history of recreational spearfishing in the Coral Sea. Although the area is perceived as relatively untouched, the data indicate that spearfishers have frequented Coral Sea reefs for at least 43 years and reported captures have increased exponentially. Post-1993 trophy captures in the Coral Sea (mean 23 kg) were larger than the adjacent GBR (9 kg). Reef species characterize the GBR catch, while large pelagic species characterize the Coral Sea catch. Provided that functionally important fishes are not targeted, the relatively small scale of recreational spearfishing and the focus on pelagic species suggests that spearfishing currently exerts limited pressure on the ecology of Coral Sea reefs.

scholarly journals Dvije tisuće godina okolišnih promjena na području središnje Hrvatske – vegetacija, požari i hidrologija utjecani klimatskim prilikama i ljudskim pritiskom

2020 ◽  
Vol 37 ◽  
pp. 117-164
Author(s):  
Dario Hruševar ◽  
Nikolina Ilijanić ◽  
Božena Mitić ◽  
Martina Weber ◽  
Katarina Husnjak Malovec ◽  
...  
Keyword(s):  
20Th Century ◽  
Middle Ages ◽  
Fire History ◽  
Ice Age ◽  
Anthropogenic Activity ◽  
Anthropogenic Pressure ◽  
Paleoenvironmental Reconstruction ◽  
Vegetation Composition ◽  
14Th Century ◽  
Cereal Pollen

This paper presents the paleoenvironmental reconstruction of a mire sequence near the village Blatuša, with a focus on changes in vegetation composition, hydrological regime and fire history of the Banovina/Kordun area during the last two millennia. For this purpose, pollen, non-pollen and charcoal analysis were done. By the application of CONISS statistical analysis three different pollen assemblage (sub)zones could have been distinguished: a dominance of alder-beech/oaks from the 2nd to the middle of the 7th century, followed by a prevalence of grasses-beech/oaks till the end of the 13th century. Finally, an assemblage of grasses-hornbeam/oaks populated the area from the 14th to the beginning of the 20th century. The high abundance of peat mosses (Sphagnum) from the 11th to the end of the 14th century must indicate increased precipitation and higher frequencies of rainfall during the Medieval Climate Anomaly. Transition from an ombrotrophic to minerotrophic phase of mire evolution during the Little Ice Age is caused by changing in moisture level, with somewhat wetter period prevailing till the middle of the 17th century followed by drier conditions till the beginning of the 20th century. Although cereal pollen grains first appear from the layers dated to the late 14th century and the proportion of secondary anthropogenic indicators were low during the entire Middle Ages, a large number of charcoal particles suggests stronger anthropogenic activity than indicated by observed changes in vegetation composition. Still, a sharp rise of non-arboreal pollen during the Migration period most likely reflect a general natural succession process on mire surface than persuable proof of Avaric-Slavic impact on vegetation. Direct anthropogenic pressure indicated by weeds and cereal pollen can be tracked from the Late Middle Ages onwards.

Economic Views of L. Trotsky

2004 ◽  
pp. 142-157
Author(s):  
M. Voeikov ◽  
S. Dzarasov
Keyword(s):  
Civil War ◽  
20Th Century ◽  
Significant Role ◽  
Historical Perspective ◽  
Russian Revolution ◽  
Russian History ◽  
History Of

The paper written in the light of 125th birth anniversary of L. Trotsky analyzes the life and ideas of one of the most prominent figures in the Russian history of the 20th century. He was one of the leaders of the Russian revolution in its Bolshevik period, worked with V. Lenin and played a significant role in the Civil War. Rejected by the party bureaucracy L. Trotsky led uncompromising struggle against Stalinism, defending his own understanding of the revolutionary ideals. The authors try to explain these events in historical perspective, avoiding biases of both Stalinism and anticommunism.

History of thyroid surgery

2020 ◽  
Vol 99 (11) ◽  
Keyword(s):  
Surgical Technique ◽  
20Th Century ◽  
Thyroid Surgery ◽  
History Of ◽  
Ancient Times

The authors present an outline of the development of thyroid surgery from the ancient times to the beginning of the 20th century, when the definitive surgical technique have been developed and the physiologic and pathopfysiologic consequences of thyroid resections have been described. The key representatives, as well as the contribution of the most influential czech surgeons are mentioned.

Könyvismertetések

2007 ◽  
Vol 62 (3) ◽  
pp. 407-420
Author(s):  
Magda Ritoókné Ádám ◽  
Olivér Nagybányai Nagy ◽  
Csaba Pléh ◽  
Attila Keresztes
Keyword(s):  
Social Psychology ◽  
20Th Century ◽  
History Of Psychology ◽  
Modern Psychology ◽  
The Social ◽  
History Of ◽  
Theoretical Issues

VárinéSzilágyiIbolya: Építészprofilok, akik a 70-es, 80-as években indultak(Ritoókné Ádám Magda)      407RacsmányMihály(szerk.): Afejlődés zavarai és vizsgálómódszerei(Nagybányai Nagy Olivér)     409Új irányzatok és a bejárt út a pszichológiatörténet-írásban (Mandler, G.: Interesting times. An encounter with the 20th century; Hergenhahn, B. N.: An introduction to the history of psychology; Schultz, D. P.,Schultz, S. E.: A history of modern psychology; Greenwood, J. D.: The disappearance of the social in American social psychology;Bem, S.,LoorendeJong, H.: Theoretical issues in psychology. An introduction; Sternberg, R. J. (ed.)Unity in psychology: Possibility or pipedream?;Dalton, D. C.,Evans, R. B. (eds): __

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