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Titlebook: Woodland Conservation and Management; G. F. Peterken Book 19811st edition G. F. Peterken 1981 biology.ecology.plant.population.population

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31#
發(fā)表于 2025-3-26 22:34:43 | 只看該作者
G. F. Peterken restrictive in order to moderate demand, correct the balance of payments position and hence moderate pressure on the exchange rate. In the period of correction, any balance of payments deficit was met largely by running down the official foreign exchange reserves.
32#
發(fā)表于 2025-3-27 03:05:17 | 只看該作者
Original natural woodlandl historians, but are important as the sources of much of Britain’s native fauna and flora, as the direct antecedents of some existing woodlands, and as the yardsticks — or controls in the scientific sense — which enable us to discover how much we have modified our natural environment.
33#
發(fā)表于 2025-3-27 09:18:33 | 只看該作者
34#
發(fā)表于 2025-3-27 10:41:55 | 只看該作者
Types of ancient semi-natural woodlandcteristic dominants and listing these species which have been recorded in more than 20% of the recorded samples. (Those which were recorded in more than 60% of the samples are marked with an asterisk.)
35#
發(fā)表于 2025-3-27 16:12:20 | 只看該作者
36#
發(fā)表于 2025-3-27 18:15:28 | 只看該作者
37#
發(fā)表于 2025-3-28 01:38:47 | 只看該作者
38#
發(fā)表于 2025-3-28 03:28:29 | 只看該作者
Ancient woodland and traditional managementexploitation and clearance, and eventually they became valuable assets managed as coppice or wood-pasture. Despite continued clearance and changes in management, many of these woods — the direct descendants of primaeval forest — survive today.
39#
發(fā)表于 2025-3-28 09:47:56 | 只看該作者
Ecological characteristics of ancient woodsmanaged, and all have been influenced to some extent by man. This influence is most obvious in the woodland structure, but it is also apparent in the plant and animal communities within woodlands, in the distribution of individual species and in soil characteristics. Nevertheless, despite various ch
40#
發(fā)表于 2025-3-28 13:43:00 | 只看該作者
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