How to interpret 尽一份责任？ This article is about IBE, Imaging Biodiversity Expedition.

怎样为野生动物保护尽一份责任
Maybe: How to best serve and protect wildlife.

I'm having trouble with understanding:  尽一份责任  Possible answers:
1. give the highest priority to all responsibilities
2. maximise (wildlife protection)
3. fulfill all the duties (of wildlife protection)
4. meet all the demands (of wildlife protection)

I don't understand quite how they mean 尽一份责任 I think it is '尽 all the responsibilities', but then, what is '尽’here? Maybe 尽 is 'all' here? '尽一份’ is maybe 'each and every'?

徐健和他的朋友曾苦苦琢磨，怎样为野生动物保护尽一份责任。他们不分昼夜地奔波，渴望拍出足以使人疯狂的照片，…

然后说：于是徐健成立了社会企业IBE，为保护区、政府等各类课题服务，…
尽  http://www.cantonese.sheik.co.uk/dictionary/characters/2662/
[3] [v] try one's best; devote to

尽 in 尽责任 means 'try one's best to  fulfill'
'尽一份责任' means 'try (their) best to fulfill (their) share of duty'
More examples of 尽 (v):
尽一分努力 (devote all effort one can summon )
尽人事 (exhaust one's ability)
尽心尽力 (exhaust one's wit and strength)