The Frogs Have More Fun...

Flowers



"All the names I know from nurse:
Gardener's garters, Shepherd's purse,
Bachelor's buttons, Lady's smock,
And the Lady Hollyhock.

Fairy places, Fairy things,
Fairy woods where the wild bee wings,
Tiny trees for tiny dames.
- These must all be Fairy names !"

(from Child's Garden of Verses
by R.L. Stevenson)


"Anyone can write a short-story.
A bad one, I mean."

(R.L. Stevenson)
----------------

"Science without conscience is the Soul's perdition."
- Francois Rabelais, Pantagruel
- Acc to/above is citated from: Medical Apartheid. The dark history of Medical Experimentation on Black Americans from Colonial Times to the Present, by Harriet A. Washington (Doubleday ; 2006 ; p. 1.)

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"In the high society of the first half of the century, marriage, despite it's bestowal status upon the wife, was the most absurdity. Marriage, conferring instanteous rank or money, ... lost most of its prestige and moment right after the wedding. ...By the end of the century, spurred by Rousseau's moralistic Nouvelle Hèloíse, a contrary cult, that of virtue, arose. After 1770 conjugal and maternal love became not merely admissible, but, for some, moral imperatives. ...

[...]
...Rousseau, who sought for himself the crown of morality in ostensibly defending marriage, presents in his Nouvelle Hèloíse the most enticing and extended defense of illicit love ever penned. The root of the problem is that as the century progressed sensibility became confused with morality: passionate feeling, if expressed in a highly civilized mode with grace and nuance, makes us forgive the Rousseau of The Confessions, for example, his pettiness, his jealousies, his betrayals. This moral-amoral byplay, present already in the novels of Richardson, was to be more intense as the century unfolded."
-
Madelyn Gutwirth : Madame De Staèl, Novelist. The emergence of the Artist as Woman (10,15.)

;
"...As the social contract seems tame in comparison with war, so fucking and sucking come to seem merely nice, and therefore unexciting. ... To be 'nice', as to be civilized, means being alienated from this savage experience - which is entirely staged. [...] The rituals of domination and enslavement being more and more practiced, the art that is more and more devoted to rendering their themes, are perhaps only a logical extension of an affluent society's tendency to turn every part of people's lives into a taste, a choice; to invite them to regard their very lives as a (life) style." - Susan Sontag , on 'Fascinating Fascism' (-74; p 103;104-5 at Under the sign of Saturn)
; "Anyone who cannot give an account to oneself of the past three thousand years remains in darkness, without experience, living from day to day." (Goethe) - as cited by Sontag (on same compile; p. 137.)

;
"It is widely accepted that we are now living in the 'Anthropocene', a new geological epoch in which the Earth's ecosystems and climate are being fundamentally altered by the activities of humans. I loathe the term, but I can't deny that it's appropriate."
; (Goulson), Silent Earth : Averting the Insect Apocalypse (2021; p 47.)
;
"It is sometimes said that humanity is at war with nature, but the word 'war' implies a two-way conflict. Our chemical onslaught on nature is more akin to genocide. It is small wonder that our wildlife is in decline."
; (Goulson, 2021 ; 118.)
;
----------------
"If we believe absurdities, we shall commit atrocities." (Voltaire)
- Citated from; (Joy, Melanie), Why We Love Dogs, Eat Pigs and Wear Cows : An Introduction to Carnism(2010; p. 95.)
;

"In the presence of the monster, you have eyes and ears for nothing else."
; (Flora Tristan) : London Journal of Flora Tristan: the Aristocracy and the Working Class of England ; 1842-edit. (tr: 1982. ; p. 71.)

;
"Every minority invokes justice, and justice is liberty.
A party can be judged of only by the doctrine which
it professes when it is the strongest."
Mdme de Staêl
(on) 'Consideration sur le Révolution de la Francaise' [1818]


5/27/09

Species Endangered (MS-Blog Series from) - II / 09


Yellow-Bellied Toad

  • Class: Amphibian
  • Order: Anura
  • Latin name: Bombina Variegata
  • Range: From Central-/Eastern Europe to Mediterranean region
  • IUCN Status: LC (Least Concern) / Cites: Not listed
(Above classifications are a 2008 situation).


Yellow-bellied Toad (Bombina variegata) is quite widespread, small-sized toad (a distinction between toad and frog is a minor but interesting one: in general toads are more accustomed to land-life, they fx usually have shorter legs and drier skin. The differences are not significant and as a term frog practically includes also toads. Therefore, not a clear taxonomic separation exists/is reasonable to make) Toads like frogs also habitat, at least for their breeding behavior, small ponds and lakes, as well as other watery places.


Yellow-bellied Toads are found mostly in foothills and mountain-sides. It can be spotted from coniferous and mixed forests, grasslands, meadows, etc, in the higher altitudes, from deciduous forests in low elevations. The diet includes most typically small terrestrial insects (but also fx small spiders, crustaceans and various aquatic insects). It hunts them by night. The bombinatoridae family are also often mentioned noticeable from their voices, which remind the sound of small clocks clacking merely than more typical frog croaks - one who has heard such 'concerto' on the late walk fx, may perhaps understand/recognize the species especial voices from this description. These toads are easily confused with their 'sister-species' Fire-Bellied Toads (Bombina bombina). Outer distinction in between species is only possible to make of small details, main one being the color in their belly-side (which is believed to serve as warning for the predators as a threatened toad may turn around upwards to show its colorful belly as a sign of being toxic/poisonous). The two parallel (sub-)species also hybridize in many their contact areas.

In contrast to various other amphibian species, Yellow-Bellied Toad is not considered particularly demanding by habitat and even tolerates some wetlands highly polluted by humans. It can also be found on urban forest parks. Since frogs in general are freshwater dependable species, their existence in the water sources often tells from the good condition of waters. Actually, as urbanization and human settlements in Europe are often dense, frogs are in places also dependable from artificial aquatic habitat. Sometimes they are found using for their breeding small wells close to urban housings (but in many places over their range, the replacement of those traditional human water use sources by newer methods is also noticed as one reason in the amphibian disappearance). Both species (-variegata/-bombina) in general are relatively common, the one in question here having a range from Mediterranean Europe to the central and eastern parts of the continent. But, the ongoing population trend in both cases is in decline.

In the strictest sense of endangerment it perhaps would not qualify for this series (from endangered species), as it is only counted LC in the IUCN list and not disappearing so fast as would mean the classification of seriously threatened. But, fx subspecies Apennine Yellow-bellied Toad (Bombina pachypus), found only in Italy is listed as endangered(EN) because of its fast decline. Further, including Bombina variegata here becomes more justified if examining the situation of amphibians in whole. Findings of the European Red List of Amphibians1 give some hint about the scope of overall decline: in addition to about 15 or more severely endangered - including critically endangered Karpathos Frog(Pelophylax cerigensis) and Montseny Brook Newt(Caloritron arnoldi) - more than half (59 per cent) of the (European) amphibian species populations were in decline and only 36 per cent found in stable state. Main significant threats found (for the amphibians) are; 1st -Habitat loss (mankind caused loss of natural habitat and suitable living area), 2nd -Pollution (including causes related to climate change), 3rd -Invasive alien species (and some hazardous diseases that affect frogs particularly, such as Chytridiomycosis) (p. 11-13 in that IUCN survey mentioned – see the note before). Looks like hard times for frogs, since their general disappearance and declining populations has already been seen happening for some decades, at least.


The disease mentioned in above chapter, chytridiomycosis is relatively recent mysterious killer of amphibian species, and still remains somewhat so. It's origins are according to some studies traceable to certain African frog-species, that was widely transported around the world and therefore seems as most potential vector in diseases spread to several continents. Though, chytridiomycosis has also been shown having existed in amphibian populations some decades, possibly latent. It has supposedly only become virulent in the more recent times. The disease most dramatically affects to amphibian decline in cooler conditions/zones (under 28 C, it is said), but it's also shown having had impact (as co-effect of Climate Change) in the regional amphibian extinctions seen since 1980s. The warming and more unstable/ambient climate may significantly hasten the spread of chytridiomycosis, noticed afterwards in some cases where dramatic population decline had happened.
More conventional and typical reasons for amphibian decline are human caused habitat destruction and urbanization; major ones also include the drying of wet-lands, road construction, water pollution. In addition to those comes the increased land cultivation and agriculturalism, but there's yet several other factors and in general decline is mostly seen a result from various reasons (as often summarised in final conclusive sentences). But, one also finds, among the most significant reasons there is also the overall increase of toxins and use of chemical contaminants(pesticides and some fertilizers, – particularly concerning the amphibians has been the Atrazine, herbicide used about since 1950s, although its more recently been banned in European Union) ; Another, probably more recent, but also mentioned as threat is the raises in UV-B Radiation ; And there's yet more conventional/regular reasons, like the animals being collected for food, pets, etc.


From amount of about over 6300 amphibians species only 85 are endemic to Europe (most numerously there habitating the moisture Mediterranean region where expected drying will cause the largest changes). If enlarging the scope to get the correct picture, that worldwide decline, precisely said, threatens about 30 per cent of their populations - And therefore more seriously than any other animal (order); birds or mammals fx. However, no single most reason is possible to raise aforth as most responsible for that.

But, there's of course plenty of reasons to say (much of) the above mentioned is related to global warming. Some frog populations, restricted to limited range or other ways particularly vulnerable, have in cases been found completely disappeared/extinct in their area. That so, even when inhabitating the protected, conservation habitat - Like that most renown 'iconic Climate Change victim'; the Golden Toad (Bufo periglenes). But, same climatic changes in the region did as well simultaneously cause the disappearance of several other frog populations. Similar losses elsewhere in the world (fx US and Australia) have also been possible to connect in the impacts of general drying. A seemingly small ecologic changes can have a big effects, sometimes; fx according to one research2 a slight reduction in the water amount in shallow ponds (from about 50 cm deep to only 20 cm deep) increased the dead-rate from 12 to 80 per cent in the amphibian tadpoles (downright reason for deaths was found from another typical amphibian disease, Saprolgenia ferax3).


For the positive side, most of the amphibians and frogs reproduce by laying multitude of eggs, and can therefore often be successfully increased in captivity. In nature most eggs and/or tadpoles die until mature age, but in the artificial human supervised conditions their great potential for reproductivity can be improved remarkably. Therefore, captive-breeding has sometimes saved threatened species from total extinction and can be used efficiently to return them for the natural wild habitat. A popular example of such, Mallorcan Midwife Toad (Alytes Muletensis) (VU) - now often mentioned as example of living fossil, because it was at first only known from the fossil remains - is a species that was supposed have gone extinct in earlier times, mostly because the early human settlement (in roman times, 2000 years ago) also introduced predators like viper snakes and competitive frogs to the island. Luckily, remains of the small population were found at remote mountains around 1980s. Since that, the toads were increased in protection, new populations from them subsequently later established for suitable areas where mentioned invasive alien species don't reach (in the mountain region of island). Also, it is counted as one of the two European endemic amphibian species that still were on the raise in population numbers, as mentioned in the earlier refered European Red List of Amphibians. (Also, there's pics/some more about the species fx at Arkive.)


Thinking optimistically, resembling that aforementioned newly discovered case, there is still also even new species found, especially in the more biodiversity rich areas like rainforests. But these are of course merely singular examples. Also, as supportive program to improve the amphibian survival, captive-breeding often is mainly a supplementary/last chance protection (in addition to other actions that would be needed in the first place.) In most cases it is always also somewhat risky, fx because there's a possibility from spread of diseases for the wild populations.


So, on the basis discussed things, our example here Bombina Variegata (Yellow-bellied Toad) fits more than adequately to present here in our series from endangered species. Even though it is a common species and not in immediate danger of extinction, seems quite plausible that future seems to hold plenty of things that could cause it becoming so. Wikipedian heading from the decline in the class/taxa also points out a fact not yet mentioned: due that amphibians have two-part life-stages(ie in brief are generally dependable from both aquatic and terrestrial conditions in during life-cycles), they are more vulnerable to human caused changes for world's biodiversity than some other animals. Whatever the most potential reason, globally alarming thing is the extinction rate, according to conservative estimates about 200 times the past rate(if compared to overall amphibians background extinctions from the past).

But, since we don't want end this post in too depressive comments, we'll finally here also remind ourselves that the amphibians have a long evolutionary history, far longer than man. And, as mentioned before, their reproductivity potential gives yet some reasons to optimism also. As well, there's also much not yet known from them; fx frogs are mentioned returning to the same places(ponds, fx) for breeding each year, which is some kind of mystery too, exact reasons unknown, if not for the frogs themselves - Only that one hopes those ponds to remain there in the future still...



Notes:

1. Temple, H.J. And Cox, N.A. 2009, European Red List of Amphibians. Luxembourg. Office for Official Publications of the European Communities. – The report available from: http://www.iucn.org/about/work/programmes/species/?3204/Europes-amphibians-and-reptiles-under-threat--- → under downloads/European Red List of Amphibians (pdf). (A studies carried by IUCN for European Commission)


2. Pounds, A.J. , 2001. Climate Change and Amphibian Declines. Nature 410; 639-40. [Cited via: Flannery, Tim, 2005. The Weather Makers. The history and Future Impact of Climate Change.]


3. Or, the diseases name may be a synomous to Chytrodimycosis(?), since its also fungus-related and Flannery mentions it as one cause in the annihilation of frog species around the world. Whatever the case, a quick search from Wikipedia didn't give us any direct answer/clarification to that important terminological question...Possibly, the term is such a new one, that it's not in any common use yet(?)... (The free Dictionary by Farlex returns us a definition from Saprolegnia Ferax (not from Saprolgenia Ferax): "A fungus that attacks living fish and tadpoles and spawn causing white fungus disease: a coating of white hyphae on especially peripheral parts (as fins)" (though, as the results from the study mentioned seem to date as far as 2001, and probably more recent research has surfaced since then, but those search results, especially the terms absence of directories and definitions, seem just...unlikely. [?])


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