scholarly journals Cold-blooded indifference: a case study of the worsening status of threatened reptiles from Victoria, Australia

2015 ◽  
Vol 21 (1) ◽  
pp. 15 ◽  
Author(s):  
Nick Clemann
Keyword(s):  
Habitat Loss ◽  
Conservation Status ◽  
Management Strategies ◽  
Single Species ◽  
Mitigation Strategies ◽  
Terrestrial Vertebrate ◽  
Australian State ◽  
The World ◽  
Conservation Actions ◽  
History Of

For the first time in the history of life, a biodiversity extinction crisis is being driven by a single species – humans. Humans also have unprecedented control over both the threats and conservation actions that influence this crisis. When prioritising conservation actions, innate human bias often favours endothermic vertebrates over other fauna. Reptiles are the least popular terrestrial vertebrate class, and consequently are particularly disadvantaged in terms of being listed as threatened and receiving conservation management. Despite 30 years of formally evaluating and listing threatened vertebrates in the Australian State of Victoria, there is a strong worsening trend in the conservation status of all faunal groups. The deteriorating status of Victorian reptiles mirrors worrying documented trends in reptile conservation status around the world. I review the history of listing threatened reptiles in Victoria, detail worsening trends in their conservation status, and suggest that, as in other parts of the world, the threats common to most listed taxa are climate change, habitat loss and degradation, and elevated rates of predation by exotic predators. I also identify poor advice and planning as a considerable threat to Victorian reptiles; this threat is rarely reported, but may be more pervasive than currently recognised. I argue that what is needed for most reptiles to have the greatest chance of persisting in the long term is prevention of habitat loss and degradation, research to underpin listing and management, improved policy so that unproven management strategies are not sanctioned, and vetting of consultant’s reports so that unproven ‘mitigation’ strategies and inadequate preimpact surveys do not mask the true cost of loss and degradation of habitat.

Dietary composition of endangered seahorses determined by stable isotope analysis

2017 ◽  
Vol 68 (5) ◽  
pp. 831 ◽  
Author(s):  
S. Valladares ◽  
D. X. Soto ◽  
M. Planas
Keyword(s):  
Stable Isotope ◽  
Environmental Changes ◽  
Conservation Status ◽  
Management Strategies ◽  
Isotope Analysis ◽  
Primary Source ◽  
Habitat Characteristics ◽  
Conservation Actions ◽  
Isotope Mixing Models ◽  
North Western

The lack of integrated measures for assessing the feeding ecology of seahorses may restrict the effectiveness of conservation actions on wild populations of worldwide threatened seahorse species. Identifying dietary sources will allow researchers to determine their degree of vulnerability to environmental changes, redefine their conservation status and apply appropriate management strategies. The resource use of the seahorse Hippocampus guttulatus inhabiting coastal waters of Galicia (north-western Iberian Peninsula) was assessed for three populations and 2 years using stable isotope mixing models. The Bayesian mixing model (MixSIAR) estimated the relative contributions of the dietary sources to the seahorse diet and revealed that Caprellidea were the primary source, followed by Gammaridea and Caridea. Mysidae and Annelida represented the less dominant prey. This prey preference can be explained by the foraging behaviour of seahorses. Different contributions of Gammaridea and Caridea to the diet were found among sites, indicating different habitat characteristics and hence different habitat use by seahorses within each site. In addition, differences were encountered among sexes. Caprellidea was the dominant prey for females, whereas Gammaridea was the dominant prey for males. The findings of the present study will contribute to the knowledge of feeding patterns of H. guttulatus, providing relevant data for conservation of this endangered species.

Salinization sources and management strategies in South Africa

2020 ◽  
Author(s):  
Maria Elenius ◽  
Alena Bartosova ◽  
Jude Musuuza ◽  
Berit Arheimer
Keyword(s):  
South Africa ◽  
World Wide ◽  
River Flow ◽  
Management Strategies ◽  
Open Data ◽  
Water Source ◽  
Global Scale ◽  
Soil Salinization ◽  
Mitigation Strategies ◽  
The World

<p>Irrigation practices of various kinds are used in farming all over the world. Especially in cases of over-irrigation and inadequate drainage, evaporation losses can be high and lead to accumulation of minerals in the soils. Water uptake in crops is driven by osmosis, and as such it is reduced or diminished when salt concentrations in the soil water increase. Today, approximately 10 % of irrigated land worldwide has faced diminished production due to salinization, and losses increase every year. There is also concern that global warming can deteriorate production further due to increased evaporation, which should be considered in the light of increasing crop demands with population growth. There is therefore pressing concern to study effects and measures on a global scale.</p><p>Continental to global scale hydrological models have emerged in recent years as tools for flood forecasting and estimation of dynamic water fluxes. HYPE is a catchment-based model that simulates rainfall-runoff as well as water quality processes. Recently, an application was developed based on HYPE that covers almost the entire globe, World Wide HYPE (Arheimer et al., 2019). This tool also has great potential for future global assessments of soil salinization under different scenarios.</p><p>In this work, a salinization routine was developed in HYPE, whereby salt components follow all main natural hydrological pathways as well as irrigation using groundwater or river flow as a water source. Equilibrium reactions, complexation and cation exchange determine the distribution between dissolved and solid states in the soil. A semi-arid catchment in South Africa with salinization issues (the Crocodile River, Mpumalanga province) was chosen for code development, calibration and verification. Evaluations were based on comparison of simulated and observed mineral concentrations in rivers and groundwater. The model was also tested for all of South Africa.</p><p>Detailed analyses of the soil salinity processes were carried out for the Crocodile River catchment. Results show the sensitivity of salinization to hydrological parameters such as recession coefficients, infiltration capacities and macropore flow. This will guide future calibration of the World Wide HYPE model setup. Assessment of the major processes and sources of salinization is performed, and mitigation strategies such as irrigation control and drainage management are tested. Possible regionalization of parameters for global salinization modeling is also suggested based on the results.</p><p>Arheimer, B., Pimentel, R., Isberg, K., Crochemore, L., Andersson, J. C. M., Hasan, A., and Pineda, L. (accepted). Global catchment modelling using World-Wide HYPE (WWH), open data and stepwise parameter estimation, Hydrol. Earth Syst. Sci, https://doi.org/10.5194/hess-2019-111, in press, 2019</p>

scholarly journals Overview of chytrid emergence and impacts on amphibians

2016 ◽  
Vol 371 (1709) ◽  
pp. 20150465 ◽  
Author(s):  
Karen R. Lips
Keyword(s):  
Physical Environment ◽  
Animal Health ◽  
Management Strategies ◽  
Design Management ◽  
Health Food ◽  
Amphibian Species ◽  
Robust Estimates ◽  
Conservation Actions ◽  
History Of ◽  
Population Numbers

Chytridiomycosis is an emerging infectious disease of amphibians that affects over 700 species on all continents where amphibians occur. The amphibian–chytridiomycosis system is complex, and the response of any amphibian species to chytrid depends on many aspects of the ecology and evolutionary history of the amphibian, the genotype and phenotype of the fungus, and how the biological and physical environment can mediate that interaction. Impacts of chytridiomycosis on amphibians are varied; some species have been driven extinct, populations of others have declined severely, whereas still others have not obviously declined. Understanding patterns and mechanisms of amphibian responses to chytrids is critical for conservation and management. Robust estimates of population numbers are needed to identify species at risk, prioritize taxa for conservation actions, design management strategies for managing populations and species, and to develop effective measures to reduce impacts of chytrids on amphibians. This article is part of the themed issue ‘Tackling emerging fungal threats to animal health, food security and ecosystem resilience’.

Victorian Lyric in the Anthropocene

2019 ◽  
Vol 47 (4) ◽  
pp. 753-783
Author(s):  
Devin M. Garofalo
Keyword(s):  
Environmental Degradation ◽  
Single Species ◽  
Life Forms ◽  
Reasonable Doubt ◽  
Human Species ◽  
Real Possibility ◽  
Charles Lyell ◽  
The World ◽  
History Of ◽  
Principles Of Geology

When Charles Lyell chronicles humankind's rise to geologic power in thePrinciples of Geology, he talks out of both sides of his mouth. Detailing the human species’ seemingly unmatched force as a terrestrial “levelling agent,” he ruminates on an unsettling possibility that haunts the present: “it admits of reasonable doubt whether, upon the whole, we fertilize or impoverish the lands we occupy.” Already at the time of Lyell's writing, the human species had “displaced” or altogether extinguished “a number of beasts of prey, birds, and animals of every class” (2:148) through deforestation, hunting, and the “progress of colonization” (2:150–51). But elsewhere in thePrinciples, Lyell puts into question what this history of environmental degradation otherwise seems to assert: that to be human is to possess a singular capacity for mastery. Thus, Lyell declares, “we ought always, before we decide that any part of the influence of man is novel and anomalous, carefully to consider all the powers of other animate agents which may be limited or superseded by him” (2:206). Tracing how swarms of insects gave dramatic and lasting shape to the German arboreal landscape in ways that humans could never replicate, he concludes: “[I]t does not follow that this kind of innovation”—human innovation—“is unprecedented” (2:206). Even as Lyell imagines humankind as “superior” in its capacity to act as “a single species,” he persistently lingers with the very real possibility that humans donotpossess a “novel and anomalous” hold over the world (2:207, emphasis original). Instead, thePrinciplestraces how the world is shaped by “physical causes” and nonhuman agencies that elude control and unmask the relative “insignifican[ce]” of humankind's “aggregate force” (2:207). Inasmuch as humans comprise only one part of an agential assemblage whose shifting interactions elude anthropogenic mastery, thePrinciplesimagines humankind as interpenetrated by and profoundly susceptible to nonhuman life-forms and forces. According to Lyell, then, deep history speaks not only of the human species’ seemingly privileged capacity for action but also its nonintentionality, noninstrumentality, and vulnerability. That thePrinciplestells a story about the porous interfaces between human and nonhuman geologic agents is perhaps surprising, given that it emerged and participated in a moment which, for many, marks the zenith of imperial and anthropogenic power.

Population genetics shed light on species delimitation and life history of the Dyckia pernambucana complex (Bromeliaceae)

2019 ◽  
Vol 192 (4) ◽  
pp. 706-725
Author(s):  
Diego S B Pinangé ◽  
Rafael B Louzada ◽  
Tina Wöhrmann ◽  
Florian Krapp ◽  
Kurt Weising ◽  
...  
Keyword(s):  
Species Delimitation ◽  
Conservation Status ◽  
Single Species ◽  
Atlantic Rainforest ◽  
Species Status ◽  
Espinhaço Range ◽  
Narrow Endemic ◽  
History Of ◽  
Diversity Dynamics ◽  
Shed Light

Abstract In the Atlantic Rainforest located north of the São Francisco River (northeast Brazil), the humid enclaves called brejos de altitude play a significant role in the diversity dynamics of local flora and fauna. The related species Dyckia pernambucana and D. limae (Bromeliaceae) are characterized by their narrow endemic occurrence in such brejos, and their species status remains unclear. In order to understand the species delimitation in those assigned taxonomic entities, patterns of gene flow and genetic variability were calculated using nuclear and plastid microsatellites and AFLP markers. In this regard, we collected populations of the Pernambuco complex (D. limae and D. pernambucana, from the Borborema Plateau) and the closest relative D. dissitiflora (from the northern Espinhaço Range). Genetic diversity was moderate, despite the possible influence of genetic drift and selfing rates. Dyckia limae could not be undoubtedly discriminated from the remaining populations of Pernambuco, and we propose the synonymization of these species. Thus, the conservation of D. limae as a formerly single species would not reflect the conservation of the minimal gene pool of the studied lineage (D. pernambucana). We also propose the revalidation of the conservation status of this species, endemic to anthropomorphic island-like mountains environments. Finally, the associations found here were consistent with the historical patterns of colonization and fragmentation of the Atlantic Rainforest.

A History of the World Semiconductor Industry

IEE Review ◽  
1991 ◽  
Vol 37 (10) ◽  
pp. 355
Author(s):  
D.A. Gorham
Keyword(s):  
Semiconductor Industry ◽  
The World ◽  
History Of

The problem of periodization of the history of religion

1997 ◽  
pp. 3-8
Author(s):  
Borys Lobovyk
Keyword(s):  
Religious Studies ◽  
Human Being ◽  
Religious Development ◽  
History Of Religion ◽  
The Social ◽  
The World ◽  
History Of ◽  
Role Of Religion

An important problem of religious studies, the history of religion as a branch of knowledge is the periodization process of the development of religious phenomenon. It is precisely here, as in focus, that the question of the essence and meaning of the religious development of the human being of the world, the origin of beliefs and cult, the reasons for the changes in them, the place and role of religion in the social and spiritual process, etc., are converging.

Mülteci olmak: Mersin’de yaşayan Filistinli mültecilerin göç hikâyeleri

2016 ◽  
Vol 3 (2) ◽  
pp. 200-224
Author(s):  
Bilge Deniz Çatak
Keyword(s):  
Oral History ◽  
Daily Life ◽  
Palestinian Refugees ◽  
Emotional Bonds ◽  
The World ◽  
History Of ◽  
Oral History Interviews ◽  
Refugee Experience

Filistin tarihinde yaşanan 1948 ve 1967 savaşları, binlerce Filistinlinin başka ülkelere göç etmesine neden olmuştur. Günümüzde, dünya genelinde yaşayan Filistinli mülteci sayısının beş milyonu aştığı tahmin edilmektedir. Ülkelerine geri dönemeyen Filistinlilerin mültecilik deneyimleri uzun bir geçmişe sahiptir ve köklerinden koparılma duygusu ile iç içe geçmiştir. Mersin’de bulunan Filistinlilerin zorunlu olarak çıktıkları göç yollarında yaşadıklarının ve mülteci olarak günlük hayatta karşılaştıkları zorlukların Filistinli kimlikleri üzerindeki etkisi sözlü tarih yöntemi ile incelenmiştir. Farklı kuşaklardan sekiz Filistinli mülteci ile yapılan görüşmelerde, dünyanın farklı bölgelerinde mülteci olarak yaşama deneyiminin, Filistinlilerin ulusal bağlılıklarına zarar vermediği görülmüştür. Filistin, mültecilerin yaşamlarında gelenekler, değerler ve duygusal bağlar ile devam etmektedir. Mültecilerin Filistin’den ayrılırken yanlarına aldıkları anahtar, tapu ve toprak gibi nesnelerin saklanıyor olması, Filistin’e olan bağlılığın devam ettiğinin işaretlerinden biridir.ABSTRACT IN ENGLISHPalestinian refugees’ lives in MersinIn the history of Palestine, 1948 and 1967 wars have caused fleeing of thousands of Palestinians to other countries. At the present time, its estimated that the number of Palestinian refugees worldwide exceeds five million. The refugee experience of Palestinians who can not return their homeland has a long history and intertwine with feeling of deracination. Oral history interviews were conducted on the effects of the displacement and struggles of daily life as a refugee on the identity of Palestinians who have been living in Mersin (city of Turkey). After interviews were conducted with eight refugees from different generations concluded that being a refugee in the various parts of the world have not destroyed the national entity of the Palestinians. Palestine has preserved in refugees’ life with its traditions, its values, and its emotional bonds. Keeping keys, deeds and soil which they took with them when they departed from Palestine, proving their belonging to Palestine.

War of Perception, Perception of Time

2018 ◽  
Vol 12 (2) ◽  
pp. 252-267
Author(s):  
Kuniichi Uno
Keyword(s):  
Michel Tournier ◽  
Crucial Question ◽  
History Of Art ◽  
The World ◽  
History Of ◽  
Desert Island ◽  
Perception Of Time

For Gilles Deleuze's two essays ‘Causes and Reasons of Desert Islands’ and ‘Michel Tournier and the World Without Others’, the crucial question is what the perception is, what its fundamental conditions are. A desert island can be a place to experiment on this question. The types of perception are described in many critical works about the history of art and aesthetical reflections by artists. So I will try to retrace some types of perception especially linked to the ‘haptic’, the importance of which was rediscovered by Deleuze. The ‘haptic’ proposes a type of perception not linked to space, but to time in its aspects of genesis. And something incorporeal has to intervene in a very original stage of perception and of perception of time. Thus we will be able to capture some links between the fundamental aspects of perception and time in its ‘out of joint’ aspects (Aion).

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