Showing posts with label plants. Show all posts
Showing posts with label plants. Show all posts

Saturday, 8 February 2014

Jesus curses a fig tree

James Tissot (French, 1836-1902).
The Accursed Fig Tree (Le figuier maudit), 1886-1894.
A passage recorded in Matthew and Mark seems somewhat enigmatic.
In the morning, as he was returning to the city, he became hungry. And seeing a fig tree by the wayside, he went to it and found nothing on it but only leaves. And he said to it, “May no fruit ever come from you again!” And the fig tree withered at once. (Matthew 21)
I have heard the complaint that it was unreasonable for Jesus to curse a fig tree for not having figs on it. I suppose one could add that it is especially unreasonable as it was not fig season (Mark 11:13), though there did not appear to be even buds, just leaves. Interestingly the disciples were not particularly concerned about this. They were impressed with Jesus control over nature. When the disciples saw it, they marvelled, saying, “How did the fig tree wither at once?” (Matthew 21)

Before addressing the curse I will take a brief diversion into a discrepancy claim. Some assert that the biblical authors disagree over whether the tree withered immediately or the next day. Matthew states,
And the fig tree withered at once.
Whereas Mark says
And [Jesus] said to it, “May no one ever eat fruit from you again.” And his disciples heard it....

And when evening came they went out of the city.

As they passed by in the morning, they saw the fig tree withered away to its roots. (Mark 11)
3 comments are in order. Firstly, we must be careful how much we read into the word "immediately." It appears to be used frequently to keep the narrative running. It is common in Mark (though not used here). Within a time focused culture such as ours "immediate" implies right now, this second, no delay. While I guess this sense may be used by 1st century Jews, I am less certain it is required.

Secondly, while I have no doubt the tree died at the moment Jesus cursed it, the question is when was this noticed? An animal's death is obvious to people at the very point of death. For plants the process is different and the outward changes are delayed. To be withered to the roots within one day is "at once" for a tree.

Thirdly, and most importantly, if the precise sequence in Mark is correct, which I suspect it is, then Matthew is conflating two episodes. Matthew wishes to discuss the fig tree episode in a single passage. The cursing of the fig tree occurs on the morning Jesus casts out the money changers. Matthew holds back on mentioning the speaking of the curse until the latter discussion about the disciples marvelling at the effect of the curse. He is following a more topical arrangement in this section.

But why the curse, especially if it was not the season for figs?

I do not know much about horticulture or the life cycle of fig trees. There is some information on figs over at Plant Encyclopedia. Fig trees are apparently deciduous and sprout fruit in spring and autumn, though related species can be evergreen or sprout fruit year around. The cursing of the fig tree occurred after the triumphal entry and before Passover, that is ~Nisan 10 and early spring.

The passage indicates Jesus uses the episode to teach his disciples about faith. It is likely that this was Jesus pronouncing a judgment on Israel for failing to recognise him. The episode occurred at the time of judgment concerning the temple, and fig trees are used as a symbol for Israel (Hosea 9:10). Interestingly Jesus tells a parable a year earlier.
A man had a fig tree planted in his vineyard, and he came seeking fruit on it and found none. And he said to the vinedresser, ‘Look, for three years now I have come seeking fruit on this fig tree, and I find none. Cut it down. Why should it use up the ground?’ And he answered him, ‘Sir, let it alone this year also, until I dig around it and put on manure. Then if it should bear fruit next year, well and good; but if not, you can cut it down.’ (Luke 13:6-9)
Here Jesus is alluding to his ministry. He has ministered to Israel for 3 years. Israel have failed to produce fruit in keeping with the coming of the Messiah. The owner wishes to remove the tree but is convinced to leave it a further year. Jesus will minister for a further year but if Israel still fails to produce fruit then they will come under a curse. The parable is a warning. A year later when Jesus ministry was at an end Israel had still failed as a nation to appropriately recognise the nature of Jesus. The real curse of a real fig tree was symbolic of judgment on the nation of Israel for failing to be fruitful by responding to Jesus.

Saturday, 6 October 2012

Species and speciation

Evolution claims common descent, that is all life forms are related to each other via a common ancestor. Every living thing shares a granddad—if we go back far enough, or put more scientifically, universal common ancestry.

The alternative is known as fixity of the species, species don't change. Of course species do change, every offspring is different to its parents. On a population level gene frequencies change and mutations arise. So fixity of the species cannot mean change does not occur, rather that it is limited. So how does one define species?

Unfortunately the number of definitions is somewhat large, and much depends on what you want your definition to do. If you favour evolution, then definitions more in line with the theory may be favoured. A creationist could do the same.

From a creationist perspective I would favour the definition of species to be that of the fundamental types of plants and animals God created to breed with each other. A tree with fruit producing seed after its kind (Genesis 1:12). Beasts after their kind (Genesis 1:25). This is the basis of baraminology.

How do we work this out in practice? Some of the animals extant are different in some ways from their likely forebears, though many bear striking resemblance!

Linnaeus was onto something. Unfortunately it seems his species and even genus categories were not broad enough. We do not have fixity of the species if we use the Linnaean taxonomy.

If we start with created kinds that can breed, changes over time may limit reproduction. For example changes in body size, or timing of fertility, or cellular incompatibility may preclude breeding. These changes may come about by genetic changes such as allelic loss, mutation, targeted adaptability, chromosomal rearrangement. So while I dispute a species definition based on isolated reproductive populations, such populations may in fact be unable to breed when reintroduced to each other.

It seems likely that the various feline species descended from a pair (or group) of cats with great capacity for variation. The same with cattle, dogs, bears, and so on. Such variation can be seen in the size difference between a lion and a domestic cat, and the coat differences between tigers and leopards.

The best working definition for "species" (or type, or kind, or baramin) would consider hybridisation. Organisms that can produce offspring whether sterile, fertile (partially or fully) would be included within the same species group. A corollary of this is organisms that share hybridisation partners (however distant) would be grouped together.

This would greatly reduce the number of species, and each species would show significant variation, but the species would be isolated from each other. Tigers, leopards, lions, jaguars, lynxes will all be grouped together, but they would remain completely distinct from bears or parrots.

This is similar to fixity of the species. It allows for greater variety than is usually envisioned, though not an alien idea if we ponder domestic dog varieties. It allows for speciation in that subsequent populations may lose breeding capacity with each other, though at the cost of decreased genetic diversity, and no capacity to generate fundamentally new organisms. Some may dispute this definition of fixity of the species by reason that such groupings are frequently at the level of family or even order, or that non-interbreeding populations may arise. Fine, I am committed to the concept, not the name. "Inviolable organism boundaries with capacity for significant adaptation" is adequately descriptive though not so eloquent.

Friday, 21 May 2010

Transforming Australia's outback

Concerning potential ecological issues in Australia MikeT writes,
Australia could work on this by working toward not only stopping the desertification of chunks of its countryside, but to actually reclaim that land. The US was able to build all sorts of canals and other assorted systems to traverse the eastern half of our country in the 19th century. With our level of technology today, there is no reason why Australia couldn't commit 0.5%-1% of GDP to a federal program to steadily transform Australia's outback over the course of several generations.
I agree with the concept. Though it is worth mentioning that Australia has a lot of desert, much more than the United States.

Australia is already doing several things to alter the situation. Several cities desalinate sea water for irrigation because of the water shortages. There has been proposals to pump waste water underground in South Australia rather than let it escape to the ocean.

I think the bush could be thinned back with a further goal of extending their area, this would decrease the fire risks dramatically, perhaps increase the water table with less trees per area removing water.

I am not certain federal funds are necessary however. I was looking for an article (which I can't find) that talked about Australian farmers working the land and altering the microclimate making the land more productive and suitable for farming. While infrastructure may possibly be a legitimate role for government, private ownership of land when sustainability is sort, can be effective. Ecologist Joe Haval worked for the Australian government advising on water catchment, planning nature reserves and forests, mapped ecological data and was involved in overseas reforestation. He also advised private companies on optimal tree planting.

A good example of private development of land is Vermont which had been stripped barren by 1850 yet a hundred years later was a garden paradise.
By 1850, in less than 100 years, Vermont had become an ecological wasteland. Then something almost miraculous happened. Over the next 100 years, from 1850 to 1950, Vermont was transformed from an ecological basket case to a special place with a picturesque pastoral landscape known the world over.
Private work in ecology may even be preferable as government involvement can be a hindrance.

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