Meanwhile , crowder says that the next step is to discover what it is about organic agriculture that promotes evenness , and to determine whether this finding also applies in systems other than potato fields .
This paper , says cadotte , demonstrates that different agricultural practices have distinct effects on evenness , and that manipulating evenness leads to the cascading reactions identified by crowder and his team .
" A parallel would be : why are the wildlife running to the edge of a forest on fire ? There will be a lot of fish , sharks , turtles trying to get out of this water they detect is not suitable , " said larry crowder , a duke university marine biologist .
If you haven 't a clue how to help , ms. crowder says , avoid voicing your anxiety or frustration .
克劳德说,如果你还是不知道该如何出手帮助孩子,那起码不要朝他们表达出你内心的焦虑和沮丧。
" Almost all the studies that have been done have looked at the number of species in an ecosystem , " says crowder .
“几乎所做的所有研究都只注重生态系统的绝对物种数量,”克劳德说。
Statistical analysis of seed data - ...... crowder .
对一组种子数据的统计分析。
Although the work of crowder and his group does not address the issue of yields from organic versus conventional farms , their study found that the increased evenness of organic farms compared with that of conventional farms led to 18 % lower pest densities and 35 % larger plants .