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土地与水资源利用

AP 环境科学 · 第 5 主题

训练
讲义 词汇表
5.1

公地悲剧

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.A
Explain the concept of the tragedy of the commons.

  • EIN-2.A.1 The tragedy of the commons suggests that individuals will use shared resources in their own self-interest rather than in keeping with the common good, thereby depleting the resources.

来源:美国大学理事会 AP 课程与考试说明

公地悲剧

公地悲剧(tragedy of the commons):当一种资源被共享并对所有人开放时(一个渔场、大气、一片牧场),每个用户为私人利益尽可能多地拿,而共享的资源为每个人被过度使用和退化。解决方案需要监管、私有化或合作管理。

词汇表 训练
英文 中文 拼音
tragedy of the commons 公地悲剧 gōng dì bēi jù
5.2

皆伐

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.B
Describe the effect of clearcutting on forests.

  • EIN-2.B.1 Clearcutting can be economically advantageous but leads to soil erosion, increased soil and stream temperatures, and flooding.
  • EIN-2.B.2 Forests contain trees that absorb pollutants and store carbon dioxide. The cutting and burning of trees releases carbon dioxide and contributes to climate change.

来源:美国大学理事会 AP 课程与考试说明

皆伐(clearcutting)一次移除一个区域的所有树木。它便宜而高效但造成侵蚀(erosion)、栖息地和生物多样性的丧失、洪水,和更高的土壤温度。恢复缓慢,而附近的溪流受泥沙之苦。

一座山坡上一条森林被完全砍光,光秃秃的棕色土壤紧挨着仍然挺立的绿树
一片新的皆伐地:那一条里的每棵树都被一次砍光,留下裸露的土壤,容易侵蚀并被冲进溪流
森林砍伐降低生物多样性并造成侵蚀、洪水和更高的 CO2
森林砍伐降低生物多样性并造成侵蚀、洪水和更高的 CO2
词汇表 训练
英文 中文 拼音
Clearcutting 皆伐 jiē fá
erosion 侵蚀 qīn shí
5.3

绿色革命

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.C
Describe changes in agricultural practices.

  • EIN-2.C.1 The Green Revolution started a shift to new agricultural strategies and practices in order to increase food production, with both positive and negative results. Some of these strategies and methods are mechanization, genetically modified organisms (GMOs), fertilization, irrigation, and the use of pesticides.
  • EIN-2.C.2 Mechanization of farming can increase profits and efficiency for farms. It can also increase reliance on fossil fuels.

来源:美国大学理事会 AP 课程与考试说明

绿色革命(Green Revolution)用高产种子、化肥(synthetic fertilizers)、农药(pesticides)、灌溉和机械化提升作物产量。它养活了数十亿人但带来成本:土壤退化、水污染、高能量和水使用,和作物多样性的丧失(单一栽培(monoculture))。

NPK 肥料供应植物最需要的三种元素
NPK 肥料供应植物最需要的三种元素
词汇表 训练
英文 中文 拼音
Green Revolution 绿色革命 lǜ sè gé mìng
synthetic fertilizers 化肥 huà féi
pesticides 农药 nóng yào
monoculture 单一栽培 dān yī zāi péi
5.4

农业实践的影响

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.D
Describe agricultural practices that cause environmental damage.

  • EIN-2.D.1 Agricultural practices that can cause environmental damage include tilling, slash-and-burn farming, and the use of fertilizers.

来源:美国大学理事会 AP 课程与考试说明

像耕作、单一栽培和大量肥料/农药使用这样的做法造成侵蚀土壤盐碱化(soil salinization)、营养径流(造成富营养化(eutrophication)),和生物多样性的丧失。可持续的方法减少这些害处。

Intensive farmland: tillage, fertilisers and monocultures raise yields but can erode soil and pollute water
Intensive farmland: tillage, fertilisers and monocultures raise yields but can erode soil and pollute water
词汇表 训练
英文 中文 拼音
soil salinization 土壤盐碱化 tǔ rǎng yán jiǎn huà
eutrophication 富营养化 fù yíng yǎng huà
5.5

灌溉方法

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.E
Describe different methods of irrigation.

  • EIN-2.E.1 The largest human use of freshwater is for irrigation (70%).
  • EIN-2.E.2 Types of irrigation include drip irrigation, flood irrigation, furrow irrigation, drip irrigation, and spray irrigation.

EIN-2.F
Describe the benefits and drawbacks of different methods of irrigation.

  • EIN-2.F.1 Waterlogging occurs when too much water is left to sit in the soil, which raises the water table of groundwater and inhibits plants' ability to absorb oxygen through their roots.
  • EIN-2.F.2 Furrow irrigation involves cutting furrows between crop rows and filling them with water. This system is inexpensive, but about 1/3 of the water is lost to evaporation and runoff.
  • EIN-2.F.3 Flood irrigation involves flooding an agricultural field with water. This system sees about 20% of the water lost to evaporation and runoff. This can also lead to waterlogging of the soil.
  • EIN-2.F.4 Spray irrigation involves pumping ground water into spray nozzles across an agricultural field. This system is more efficient than flood and furrow irrigation, with only 1/4 or less of the water lost to evaporation or runoff. However, spray systems are more expensive than flood and furrow irrigation, and also requires energy to run.
  • EIN-2.F.5 Drip irrigation uses perforated hoses to release small amounts of water to plant roots. This system is the most efficient, with only about 5% of water lost to evaporation and runoff. However, this system is expensive and so is not often used.
  • EIN-2.F.6 Salinization occurs when the salts in groundwater remain in the soil after the water evaporates. Over time, salinization can make soil toxic to plants.
  • EIN-2.F.7 Aquifers can be severely depleted if overused for agricultural irrigation, as has happened to the Ogallala Aquifer in the central United States.

来源:美国大学理事会 AP 课程与考试说明

灌溉(irrigation)给作物供水,而且它是人类淡水的最大用途 —— 约占 70%,这是考试要你知道的一个数字。(drip)灌是最高效的(最少蒸发);(flood)和(spray)方法浪费更多水并能造成渍水(waterlogging)和盐碱化(salinization),因为蒸发留下盐。过度灌溉耗尽含水层(aquifers)(地下的淡水储存)的速度比它们补充的更快。

灌溉方法比较:滴灌浪费最少水,漫灌最多
灌溉方法比较:滴灌浪费最少水,漫灌最多
词汇表 训练
英文 中文 拼音
Irrigation 灌溉 guàn gài
aquifers 含水层 hán shuǐ céng
5.6

病虫害防治方法

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.G
Describe the benefits and drawbacks of different methods of pest control.

  • EIN-2.G.1 One consequence of using common pest-control methods such as pesticides, herbicides, fungicides, rodenticides, and insecticides is that organisms can become resistant to them through artificial selection. Pest control decreases crop damage by pest and increases crop yields.
  • EIN-2.G.2 Crops can be genetically engineered to increase their resistance to pests and diseases. However, using genetically engineered crops in planting or other ways can lead to loss of genetic diversity of that particular crop.

来源:美国大学理事会 AP 课程与考试说明

农药(pesticides)杀死害虫并提高产量,但造成问题:它们伤害非目标物种、污染水,并驱动抗药性(pesticide resistance)(幸存者繁殖,所以需要更强的剂量——"农药跑步机")。

Aerial pesticide spraying: chemical pest control can protect yields but also harm non-target species and create resistant pests
Aerial pesticide spraying: chemical pest control can protect yields but also harm non-target species and create resistant pests
词汇表 训练
英文 中文 拼音
pesticide resistance 抗药性 kàng yào xìng
5.7

肉类生产方法

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.H
Identify different methods of meat production.

  • EIN-2.H.1 Methods of meat production include concentrated animal feeding operations (CAFOs), also called feedlots, and free-range grazing.

EIN-2.I
Describe the benefits and drawbacks of different methods of meat production.

  • EIN-2.I.1 Meat production is less efficient than agriculture; it takes approximately 20 times more land to produce the same amount of calories from meat as from plants.
  • EIN-2.I.2 Concentrated animal feeding operation (CAFOs) are used as a way to quickly get livestock ready for slaughter. They tend to be crowded, and animals are fed grains or feed that are not as suitable as grass. Additionally, feedlots generate a large amount of organic waste, which can contaminate ground and surface water. The use of feedlots are less expensive than other methods, which can keep costs to consumers down.
  • EIN-2.I.3 Free range grazing allows animals to graze on grass during their entire lifecycle. Meat from free range animals tends to be free from antibiotics and other chemicals used in feedlots. Organic waste from these animals acts as fertilizer. Free range grazing requires large areas of land and the meat produced is more expensive for consumers.
  • EIN-2.I.4 Overgrazing occurs when too many animals feed on a particular area of land. Overgrazing causes loss of vegetation, which leads to soil erosion.
  • EIN-2.I.5 Overgrazing can cause desertification. Desertification is the degradation of low precipitation regions toward being increasingly arid until they become deserts.
  • EIN-2.I.6 Less consumption of meat could reduce $\text{CO}_2$, methane, and $\text{N}_2\text{O}$ emissions; conserve water; reduce the use of antibiotics and growth hormones; and improve topsoil.

来源:美国大学理事会 AP 课程与考试说明

生产肉,尤其是在集中动物饲养作业(concentrated animal feeding operations)(CAFOs)里,使用大量的土地、水、饲料和能量,并产生废物和甲烷(methane)(一种温室气体)。肉比植物食物远不那么能量高效,因为 10% 规则——更高的营养级浪费更多能量。

过度放牧(overgrazing) - 让牲畜吃掉植被的速度快于它重新长出的速度 - 剥去了土壤的保护覆盖。在干旱的土地上,这能驱动荒漠化(desertification):低降水地区退化直到变成沙漠。可持续的办法是轮牧(rotational grazing),定期把牲畜在不同牧场之间轮换,这样没有哪一块地被啃到光秃。

词汇表 训练
英文 中文 拼音
methane 甲烷 jiǎ wán
Overgrazing 过度放牧 guò dù fàng mù
desertification 荒漠化 huāng mò huà
rotational grazing 轮牧 lún mù
5.8

过度捕捞的影响

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.J
Describe causes of and problems related to overfishing.

  • EIN-2.J.1 Overfishing has led to the extreme scarcity of some fish species, which can lessen biodiversity in aquatic systems and harm people who depend on fishing for food and commerce.

来源:美国大学理事会 AP 课程与考试说明

过度捕捞(overfishing)移除鱼的速度比它们繁殖更快,使种群崩溃(像鳕鱼)。兼捕(bycatch)(不想要的捕获)和破坏性的方法(底拖网)损害生态系统。它是开阔海洋里一个经典的公地悲剧。

探索

Push a fish stock past its limit

A population grows toward its carrying capacity $K$, but harvesting faster than it can breed collapses the stock. Raise the pressure and watch the population crash.

词汇表 训练
英文 中文 拼音
Overfishing 过度捕捞 guò dù bǔ lāo
5.9

采矿的影响

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.K
Describe natural resource extraction through mining.

  • EIN-2.K.1 As the more accessible ores are mined to depletion, mining operations are forced to access lower grade ores. Accessing these ores requires increased use of resources that can cause increased waste and pollution.
  • EIN-2.K.2 Surface mining is the removal of large portions of soil and rock, called overburden, in order to access the ore underneath. An example is strip mining, which removes the vegetation from an area, making the area more susceptible to erosion.

EIN-2.L
Describe ecological and economic impacts of natural resource extraction through mining.

  • EIN-2.L.1 Mining wastes include the soil and rocks that are moved to gain access to the ore and the waste, called slag and tailings that remain when the minerals have been removed from the ore. Mining helps to provide low cost energy and material necessary to make products. The mining of coal can destroy habitats, contaminate ground water, and release dust particles and methane.
  • EIN-2.L.2 As coal reserves get smaller, due to a lack of easily accessible reserves, it becomes necessary to access coal through subsurface mining, which is very expensive.

来源:美国大学理事会 AP 课程与考试说明

采矿(mining)提取矿物和燃料但扰动土地,尤其是露天(条带)采矿(surface (strip) mining)和山顶移除(mountaintop removal)。影响包括栖息地破坏、酸性矿山废水(acid mine drainage),和污染水的有毒尾矿。

当容易开采的矿床用完后,采矿转入地下,即地下开采(subsurface mining),它昂贵且危险得多 - 随着煤的易采储量缩小,同样的模式也适用于煤。

一座巨大的露天矿:一圈圈阶梯状的台阶深深切入地下,横跨数公里
一座露天矿(open-pit mine):台阶被切得越来越宽、越来越深以够到矿石,破坏栖息地并暴露出污染水的岩石
词汇表 训练
英文 中文 拼音
Mining 采矿 cǎi kuàng
acid mine drainage 酸性矿山废水 suān xìng kuàng shān fèi shuǐ
subsurface mining 地下开采 dì xià kāi cǎi
open-pit mine 露天矿 lù tiān kuàng
5.10

城市化的影响

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.M
Describe the effects of urbanization on the environment.

  • EIN-2.M.1 Urbanization can lead to depletion of resources and saltwater intrusion in the hydrologic cycle.
  • EIN-2.M.2 Urbanization, through the burning of fossil fuels and landfills, affects the carbon cycle by increasing the amount of carbon dioxide in the atmosphere.
  • EIN-2.M.3 Impervious surfaces are human-made structures—such as roads, buildings, sidewalks, and parking lots—that do not allow water to reach the soil, leading to flooding.
  • EIN-2.M.4 Urban sprawl is the change in population distribution from high population density areas to low density suburbs that spread into rural lands, leading to potential environmental problems.

来源:美国大学理事会 AP 课程与考试说明

城市化(urbanization)用不透水面(impervious surfaces)(道路、建筑)替换自然土地,增加径流和洪水、创造热岛(urban heat islands),并产生污染和废物。城市蔓延(urban sprawl)消耗农田和栖息地。它还给水循环(hydrologic cycle)带来压力:一座密集的城市耗尽当地的水,而在沿海地区大量抽取地下水会把海水引入含水层 —— 海水入侵(saltwater intrusion)—— 这可能毁掉一处淡水供应。

俯瞰低密度的独户住宅在曾经的农田上向天边铺开
城市扩张:住房在曾经的农田上铺开,把土壤封住,所以雨水径流而不下渗
词汇表 训练
英文 中文 拼音
Urbanization 城市化 chéng shì huà
impervious surfaces 不透水面 bù tòu shuǐ miàn
urban heat islands 热岛 rè dǎo
hydrologic cycle 水循环 shuǐ xún huán
saltwater intrusion 海水入侵 hǎi shuǐ rù qīn
urban sprawl 城市扩张 chéng shì kuò zhāng
5.11

生态足迹

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

EIN-2
When humans use natural resources, they alter natural systems.

EIN-2.N
Explain the variables measured in an ecological footprint.

  • EIN-2.N.1 Ecological footprints compare resource demands and waste production required for an individual or a society.

来源:美国大学理事会 AP 课程与考试说明

一个生态足迹(ecological footprint)测量一个人或种群需要多少土地和水来供应资源和吸收废物。富有的、高消费的国家有大得多的足迹。若每个人的足迹超过地球的容量,资源正被不可持续地使用。

Worked example. 地球每人提供大约 $1.6$ 全球公顷(gha)的生物承载力(biocapacity)。若平均人的足迹是 $2.7\ \text{gha}$,人类正在需求约 $\tfrac{2.7}{1.6}\approx1.7$ 个地球——生活超过地球能更新的。更糟的是,若每个人都像一个高收入国家那样以每人 $8\ \text{gha}$ 消费,它会需要 $\tfrac{8}{1.6}=5$ 个地球——正是为什么每人足迹是关键的可持续性尺度。

词汇表 训练
英文 中文 拼音
ecological footprint 生态足迹 shēng tài zú jì
5.12

可持续性导论

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

STB-1
Humans can mitigate their impact on land and water resources through sustainable use.

STB-1.A
Explain the concept of sustainability.

  • STB-1.A.1 Sustainability refers to humans living on Earth and their use of resources without depletion of the resources for future generations. Environmental indicators that can guide humans to sustainability include biological diversity, food production, average global surface temperatures and $\text{CO}_2$ concentrations, human population, and resource depletion.
  • STB-1.A.2 Sustainable yield is the amount of a renewable resource that can be taken without reducing the available supply.

来源:美国大学理事会 AP 课程与考试说明

可持续性(sustainability)意味着满足当前的需要而不伤害未来世代满足他们的能力。它平衡环境健康、经济可行性和社会公平,使用资源不快于它们能被替换。

Wind turbines on farmland: sustainable resource use meets present needs without locking out future generations
Wind turbines on farmland: sustainable resource use meets present needs without locking out future generations
词汇表 训练
英文 中文 拼音
Sustainability 可持续性 kě chí xù xìng
5.13

减少城市径流的方法

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

STB-1
Humans can mitigate their impact on land and water resources through sustainable use.

STB-1.B
Describe methods for mitigating problems related to urban runoff.

  • STB-1.B.1 Methods to increase water infiltration include replacing traditional pavement with permeable pavement, planting trees, increased use of public transportation, and building up, not out.

来源:美国大学理事会 AP 课程与考试说明

透水路面(permeable pavement)、雨水花园(rain gardens)和绿色屋顶(green roofs)、滞留池,和保留的植被减少径流。这些让水浸入,过滤污染物并补充地下水而不是淹没溪流。

词汇表 训练
英文 中文 拼音
permeable pavement 透水路面 tòu shuǐ lù miàn
green roofs 绿色屋顶 lǜ sè wū dǐng
5.14

病虫害综合治理

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

STB-1
Humans can mitigate their impact on land and water resources through sustainable use.

STB-1.C
Describe integrated pest management.

  • STB-1.C.1 Integrated pest management (IPM) is a combination of methods used to effectively control pest species while minimizing the disruption to the environment. These methods include biological, physical, and limited chemical methods such as biocontrol, intercropping, crop rotation, and natural predators of the pests.

STB-1.D
Describe the benefits and drawbacks of integrated pest management (IPM).

  • STB-1.D.1 The use of integrated pest management (IPM) reduces the risk that pesticides pose to wildlife, water supplies, and human health.
  • STB-1.D.2 Integrated pest management (IPM) minimizes disruptions to the environment and threats to human health but can be complex and expensive.

来源:美国大学理事会 AP 课程与考试说明

综合虫害管理(integrated pest management)(IPM)结合方法——生物控制(自然捕食者)、轮作、有限的定向农药,和监测——以更少的化学使用控制害虫,减慢抗性并保护非目标物种。

词汇表 训练
英文 中文 拼音
Integrated pest management 综合虫害管理 zōng hé chóng hài guǎn lǐ
5.15

可持续农业

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

STB-1
Humans can mitigate their impact on land and water resources through sustainable use.

STB-1.E
Describe sustainable agricultural and food production practices.

  • STB-1.E.1 The goal of soil conservation is to prevent soil erosion. Different methods of soil conservation include contour plowing, windbreaks, perennial crops, terracing, no-till agriculture, and strip cropping.
  • STB-1.E.2 Strategies to improve soil fertility include crop rotation and the addition of green manure and limestone.
  • STB-1.E.3 Rotational grazing is the regular rotation of livestock between different pastures in order to avoid overgrazing in a particular area.

来源:美国大学理事会 AP 课程与考试说明

可持续农业保护土壤和水:轮作(crop rotation)、覆盖作物(cover crops)、等高耕作(contour plowing)、梯田(terracing)、减少耕作,和农林复合(agroforestry)。这些削减侵蚀、维持肥力,并减少化学投入。

绿色的稻田被塑造成沿着陡坡等高线弯曲的水平台阶
水稻梯田把陡坡切成水平的台阶,所以水和土壤留在原地而不向下侵蚀
词汇表 训练
英文 中文 拼音
crop rotation 轮作 lún zuò
contour plowing 等高耕作 děng gāo gēng zuò
terracing 梯田 tī tián
5.16

水产养殖

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

STB-1
Humans can mitigate their impact on land and water resources through sustainable use.

STB-1.F
Describe the benefits and drawbacks of aquaculture.

  • STB-1.F.1 Aquaculture has expanded because it is highly efficient, requires only small areas of water, and requires little fuel.
  • STB-1.F.2 Aquaculture can contaminate wastewater, and fish that escape may compete or breed with wild fish. The density of fish in aquaculture can lead to increases in disease incidences, which can be transmitted to wild fish.

来源:美国大学理事会 AP 课程与考试说明

水产养殖(aquaculture)(养鱼)减轻对野生种群的压力并高效,但能用废物和抗生素污染水、把疾病传给野生鱼,并破坏栖息地(像为虾场的红树林)。

词汇表 训练
英文 中文 拼音
Aquaculture 水产养殖 shuǐ chǎn yǎng zhí
5.17

可持续林业

大纲
Enduring UnderstandingLearning ObjectiveEssential Knowledge

STB-1
Humans can mitigate their impact on land and water resources through sustainable use.

STB-1.G
Describe methods for mitigating human impact on forests.

  • STB-1.G.1 Some of the methods for mitigating deforestation include reforestation, using and buying wood harvested by ecologically sustainable forestry techniques, and reusing wood.
  • STB-1.G.2 Methods to protect forests from pathogens and insects include integrated pest management (IPM) and the removal of affected trees.
  • STB-1.G.3 Prescribed burn is a method by which forests are set on fire under controlled conditions in order to reduce the occurrence of natural fires.

来源:美国大学理事会 AP 课程与考试说明

可持续林业保持森林多产:择伐(selective cutting)而不是皆伐、重新种植、沿溪流留缓冲带,和长的轮伐时间。它维持栖息地、防止侵蚀,并让森林继续提供生态系统服务。

森林还吸收污染物并储存二氧化碳,所以砍伐和焚烧它们会释放 $\text{CO}_2$ 并加剧气候变化。缓解森林砍伐的方式包括重新造林(reforestation)(重新栽种)、购买来自生态可持续林业的木材,以及重复使用木材。另一个工具是计划烧除(prescribed burn):在受控的条件下故意焚烧一片森林以清除燃料,这样后来的野火就无法酿成灾难。

词汇表 训练
英文 中文 拼音
selective cutting 择伐 zé fá
reforestation 重新造林 chóng xīn zào lín
prescribed burn 计划烧除 jì huà shāo chú
5.17

考试技巧

  • 解释公地悲剧——共享的、无主的资源被过度使用——以及规则/所有权如何防止它。
  • 权衡绿色革命、灌溉(盐碱化、含水层耗尽)和采矿/城市化的取舍。
  • 以"地球的数量"计算一个生态足迹(足迹 ÷ 每人生物承载力);它按每人测量。
  • 列出森林砍伐的害处(侵蚀、洪水、失去的栖息地、更多 CO₂)。
  • 定义可持续性(满足需要而不伤害未来世代)并给出可持续的方法(IPM、轮作、配额)。

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