人类正变得越来越爱吃肉(图)---中国比美国好些

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来源: Nature Humans are becoming more carnivorous

Study reveals global shift towards animal-based diet — a bad omen for the environment.

02 December 2013

A country-by-country breakdown of the median human trophic level, which shows humans' place in the global food chain on a scale that goes from 1 (organisms such as plants that get their energy from the Sun) to 5.5 (top predators such as polar bears or orcas).

其中的段落:

The metric puts plants and algae, which make their own food, at trophic level 1. Rabbits, which eat plants, occupy level 2. Foxes, which eat herbivores, sit at trophic level 3. Cod, a fish that eats other fish, claims level 4. Polar bears and orcas, which have few or no predators and eat other mammals with gusto, hold the top positions — levels up to 5.5.

该食性层次将自给自足的植物与藻类设定为1级食性层次；以植物为食的兔子被划归为2级食性层次；吃植食动物的狐狸属于3级食性层次；以其他鱼类为食的鳕鱼则占据了4级食性层次；而像北极熊和逆戟鲸这样鲜有甚至没有天敌且以其他哺乳动物为食的物种则把持着食物链的顶端——5.5级食性层次。
......

“It seems like a small difference, but when you think about how it’s calculated, it’s big,” says Thomas Kastner, an environmental scientist at Alpen-Adria University in Vienna, who was not involved in the study. An organism’s trophic level is calculated by summing the trophic levels of the foods in its diet and the proportion in which they are consumed. “A change by 0.1 means you are eating considerably more meat or animal-based foods,” says Kastner

并未参与该项研究的奥地利维也纳阿尔卑斯-亚德里亚大学环境学家Thomas Kastner表示：“这看起来是一个很小的差异，但是当你考虑到它是如何计算出来的，这便是一个很大的不同。”一个生物体的食性层次是利用其食物的食性层次之和，以及它们被消耗的比例计算而来的。Kastner说：“0.1的改变都意味着你正在食用更多的肉类或基于动物的食物。”

全文:
Humans are becoming more carnivorous

英国著名的插画师Kyle Lambert用iPad画出来的猫。很酷，准备圣诞节抢一个送给老爸爸。